- Copyright: AP
This is all for our live text commentary of Chelsea v Southampton. But that isn't the end of our football coverage for the evening. From 22:30 BST you can join in the online debate alongside Match of the Day by staying across our MOTD Social.
I'll leave you with this stat, an ominous one for Chelsea...
In case you needed a reminder as to why you should watch Match of the Day tonight, here is a big reason...
Chelsea goalkeeper Asmir Begovic: "Hopefully this break comes at a good time, we get a result in the next game and drive on from there.
"We scored at a good time but unfortunately couldn't build from there. Southampton took their chances and made things difficult.
"When things are not going your way it's tough. It's a mental thing as well, something we need to keep fighting for - run through a brick wall, as they say.
"That's the way it goes when results don't go your way, confidence takes a hit. That's life, that's football. You go through your ups and downs."
More from Chelsea manager Jose Mourinho: "I live in my case as manager. I live a situation where I know the player is good and I trust the player. I know what the player did for us in previous seasons. He is in a very bad momentum.
"What do I do? I trust him and keep him in the team or I change him. In this moment I am doing both. Sometimes I change and sometimes I give them two or three matches.
"In this moment I feel they all accept the decisions, understand the moment and understand I can drop or keep them to give them confidence."Copyright: PA
Apologies to Chelsea fans but I'm going to throw a few stats (courtesy of Opta) out there that may lead to fear and panic...
Copyright: Getty Images
- Chelsea have conceded at least two goals in seven of their eight Premier League games this season (the other game was a 2-0 win against Arsenal).
- This is Chelsea’s lowest points total after eight games in a top-flight season since 1978-79 (4 points), when the two-points for a win rule was operating. Chelsea were relegated in this season.
- Only Sunderland (18) have conceded more Premier League goals than Chelsea this season.
Southampton manager Ronald Koeman on Sky Sports: "That's a confidence everybody needs. If we can show this against Chelsea we can show it much more.
"We had a difficult start to the game, but we came back and we made it 1-1 with a great goal. The difference was how we came out of the dressing room, pressed Chelsea and had fantastic movement.
"In my opinion, we totally deserve three points today. Maybe, if they had one penalty we had two penalties, that's a decision for the referee.
"We've had experience of going 1-0 down. We showed belief and close to half time we were the better team. We tried to play good football, offensive football because we believe in that way of football."Copyright: PA
A small consolation for Jose and Chelsea; they have been shielded from top billing on Match of the Day by Sergio Aguero's heroics. Minuscule consolation.
BBC One, 22;30 BST. Do not miss it:
Man City v Newcastle
Chelsea v Southampton
Sunderland v West Ham
Norwich v Leicester
Crystal Palace v WBA
Bourneouth v Watford
Aston Villa v Stoke
Let's give Southampton some love. They defended resolutely, they attacked ruthlessly. They had the best player on the pitch in Sadio Mane. They are the first team to score three goals at Stamford Bridge against a Jose Mourinho team in the Premier League. They are now up to ninth in the table with 12 points.Copyright: AP
Plenty of reaction to that Jose Mourinho reaction...
Matt Fallon: Deep words from Jose there! Few mentions of being sacked.... things happening behind the scenes?
Mark Russell: Mourinho reckons referees are afraid to give penalties. Looking at Ivanovic on van Dijk in the first half, he may have a point.
Dan: Mourinho: I have to take responsibility. Proceeds to lose the plot and blame everyone else.
The referee was to blame for not giving a penalty to Chelsea for the incident involving Radamel Falcao. I can sympathise with Jose on the decision not to award a spot-kick for this, as it was a very valid claim.
However, this ignores the two clear incidents when Southampton should have been awarded a penalty for the shirt-tug on Virgil van Dijk and the trip on Sadio Mane. You win some, you lose some.
Oh, and the fact that Southampton were the better side. That too.Copyright: Getty Images
I would just like to add that all those quotes from Jose Mourinho constitute a single answer to the first question from his interviewer.
It was a seven-minute stream of consciousness from a man clearly under pressure, which he signed off with a simple "thank you, goodbye".
More from Jose Mourinho on Sky Sports: "If the club wants to sack me they have to sack me because I am not running away. To be champions now is very difficult because the distance is so much but I am convinced we will finish in the top four.
"It is a crucial moment in the history of this club because if they sack me they sack the best manager this club has ever had. The message is that the results are the fault of the manager.
"This is a moment for everybody to assume their responsibilities and stick together."Copyright: Getty ImagesCopyright: Getty Images
Chelsea manager Jose Mourinho speaking to Sky Sports: "Look, I think you know me and I don't run away from my responsibilities. First, I want to say because we are in such a bad moment you should not be afraid to be honest.
"The referees are afraid to give decisions for Chelsea. At 1-1, it is a huge penalty and once again we don't get. If the FA wants to punish me they can. They don't punish other managers. My players deserve it and the fans deserve it.
"Referees are afraid to give decisions for Chelsea, why because there is always a question mark and we are always punished.
"Clear penalties are not given. Even in the Champions League in a match we lose 2-1, we are not given a penalty in the last minute.
"The penalty in this game is crucial because my team, at the moment, the first negative thing that happens, they collapse.
"The penalty was a giant penalty and after that the team lost even more confidence."Copyright: PA
Jose Mourinho has been speaking after the game and what he has had to say is worth sticking around for. He states that he will not walk away from the club and that the club will have to sack him to get rid of him, a manager he describes as "the best the club has ever had." Full quotes coming soon.
- SMS Message: Huge test for Jose now. No disputing he is one of the great managers but most of it has been achieved with huge financial backing. Now he has to manage his way out and not spend his way out. Can he do it ? Not so sure this time. from Kevin in Hornchurch
- Copyright: Getty Images
Just to add, this was a Southampton team who were without a win in 10 away league games. They have made a mockery of that stat.
Chelsea are 16th in the table, four points above the bottom three. They are 10 points behind leaders Manchester City and six points off the top four.
They were outplayed and outfought by Southampton today.
If it wasn't a crisis before this, it surely is now.
What's going on behind the scenes at Stamford Bridge?
Anükram Adhikary: Blame the players all you want but if the manager is a self-proclaimed "The Special One", he has to take the blame too.
Donald Oluoch: Desperate times for Mourinho. Bring on Matic at half time then removing him after 27 minutes. Not sure what's happening.
Ian: At what point does Mourinho start looking over his shoulder and worry about his job. Especially with Klopp available.
Surely Jose's lowest ebb? Eight games, eight points, zero confidence. Those celebrations back in May seem a long, long time ago.
The headlines will focus on the escalating crisis at Chelsea. But this should not distract from a superb display from Southampton, who came from behind and deservedly won.Copyright: Getty ImagesCopyright: Reuters
John Terry slams a pass out wide straight out of play. If ever one incident summed up a performance.
Take a bow Sadio. The Saints forward has been superb this evening.
The 90 minutes are up. Stamford Bridge is emptying very quickly. There will be five minutes of added time, though. Still the tiniest glimmer of hope for the Blues.Copyright: PA
Oscar aims a pass out wide to Cesc Fabregas. At least I think that was the aim. In keeping with Chelsea's display the ball flies out of play. The belief has completely drained out of this Chelsea side.
- Copyright: ReutersSMS Message: I will say it first, Mourinho out. Clueless and out of his depth. Klopp in. from Dan, Farnborough.SMS Message: Abramovich looked totally fed up at half time - if the game continues in the same mood what odds on Mourinho still being in charge for the next game?? from Kim
Falcao hits it and would have hit the target, but for a flick off the wall that takes the ball over the bar.
From the resulting corner, Maarten Stekelenburg jumps and flicks the ball off the head of John Terry.Copyright: PA
Here is a chance for Chelsea. Eden Hazard is chopped down by Graziano Pelle on the edge of the box, earning himself a yellow card. Big moment, this. Radamel Falcao is over the free-kick...
Pedro looks for a way through but his low shot from inside the box is deflected behind by Jose Fonte. However, Chelsea are unable to fashion anything from the corner. This game is sprinting away from them.Copyright: Reuters
Saints keeper Maarten Stekelenburg gets out of jail. He drops Loic Remy's cross from the left at the feet of Eden Hazard but the ball just skips away from the Belgian before it is hammered clear.
Desperate times now for Chelsea. They are pushing forward but are getting nowhere thanks to solid, energetic defensive work from Southampton.
Cesc Fabregas is forced to have a pop from range, which flies well wide of goal.
James Ward-Prowse goes into the book for pulling a Chelsea man back.
Chelsea are all over the shop. A team in total meltdown. Gary Cahill again gives the ball away to Sadio Mane in a dangerous area near his own box, allowing the Saints forward to cut in and find Dusan Tadic, who is only prevented from making it 4-1 by a block from John Terry.
This is the champions remember. The team who won the league comfortably last season. I doubt they could open a bag of crisps without spilling them all over the floor at the moment.
- Copyright: Reuters
Jose Mourinho said he was under pressure before today's game. Well, that pressure's rising...
Mark: Given their concurrent drop in form I can only assume that Eva Carniero was actually coaching the team for Mourinho.
James: Chances of Chelsea spending £100m in January on new defenders? Evens.
Alan Nicol: Chelsea should do what other "top" clubs do. Buy Saints' best players.
The substitute is substituted. This is a bold call from Mourinho, who sends on Loic Remy and withdraws Nemanja Matic.
- Copyright: Getty Images
Chelsea are stunned. Southampton jubilant. The Blues are in total disarray. It is another error as the ball is given away on the halfway line, allowing Sadio Mane to charge forward before finding Graziano Pelle, who drives a low, angled shot into the far corner.
It is nothing less than Southampton deserve. What now Jose?
John Terry puts a strong head on the ball to clear the free-kick after it is delivered into the box before James Ward-Prowse fires a shot over the bar.
How long since Chelsea properly threatened the Saints goal. A while.
Southampton are first to every ball now. They win a succession of 50/50 tackles before Branislav Ivanovic fouls Dusan Tadic to give Southampton a dangerous free-kick on the left.
- Copyright: Reuters/AP
A penny for the thoughts of Jose Mourinho. He can have no complaints. Southampton have been asking questions of the Blues and they have had no answer.
The Chelsea boss responds to the Saints' second goal by sending on Pedro for Willian.
Well, well, well, what a situation we have on our hands now. Sadio Mane has been threatening throughout this half and, at the fifth time of asking, he strikes. He is given two huge helping hands by Chelsea as Gary Cahill gives the ball away and then John Terry is brushed off the ball by Mane, who collects Graziano Pelle's pass and slots in under Asmir Begovic.Copyright: Getty Images
Now then. This is a big moment. Radamel Falcao gets past Jose Fonte in the box and tries to get to the ball ahead of the diving Maarten Stekelenburg. He appears to do just that before tumbling over the keeper's frame. Falcao's feet definitely came into contact with Stekelenburg's shoulders, but was that purposefully done by the forward? The referee thinks yes and books him for a dive.Copyright: Getty Images
Oscar looks to get the Blues going again with a cross towards Radamel Falcao at the back post, but Ryan Bertrand gets his body between the striker and ball and provides enough of an obstacle to ensure the ball drifts harmlessly out of play.
Southampton are feeding off Chelsea's uncertainty and nervousness. The men in red and white are hunting in packs, causing errors and look dangerous every time they pour forward.
Chelsea need to dig in or this evening could get even worse for them, when what they desperately need is for it to get much better.Copyright: PA
Blues fans are voicing their opinions on who is at fault for Chelsea under-performing this season...
Jamie Jennrich: Really need to drop Ivanovic, his sloppy pass lead to the foul which led to the goal - enough is enough.
Shohidur Rahman: Don't get Koeman's tactics. Giving Ivanovic a free ride. Why not put Mane on that side?
Lifa Nati: Chelsea will lose because Mourinho continues to play the same under-performing players. Fabregas being one of them.Copyright: Reuters
There's no hiding place for Mourinho as Southampton start the first half on the front foot. The perspex dugout isn't shielding Jose from his side's performanceCopyright: Getty Images
Three big chances for Sadio Mane to put Southampton ahead in the space of a minute. The first is a sliding finish, set up by a lovely ball for Dusan Tadic into the box, but denied by a good save from Asmir Begovic. The second and third are efforts from deep in the box, both blocked by a Chelsea defender. James Ward-Prowse ends the attack by firing wide from 20 yards.
Chelsea are hanging on by their fingertips.
- Copyright: Opta
Ramires has paid the price for a disappointing half in which he struggled to make an impression. Most of his forward passes were unsuccessful (red arrows).
- Copyright: PA
The players are back out. Big 45 minutes coming up.
Both teams have made a change. James Ward-Prowse for Oriol Romeu for Southampton, probably because the latter had been booked.
Nemanja Matic is on for Ramires, probably for the same reasons.
Jose Mourinho had a point when he referred to this as his worst spell in management. They have conceded as many Premier League goals this season as they did in all of Jose Mourinho's first season as manager in 2004-05. 15 in total and counting.
In addition, they have kept only two clean sheets in 12 matches this campaign in all competitions.
It started so well for the struggling Blues with Willian's opener. But they have a real game on their hands now thanks to Davis' leveller. It could have been worse as well, with Southampton having two good penalty shouts turned down.
Jose Mourinho needs a big half-time team-talk if he is to conjure up a result to end the 'worst spell of his career'.Copyright: PA
For once, Willian's free-kick skills let him down as his set-piece (given for a foul on Oscar 25 yards from goal) strikes the wall. That will be the last act of the half.
- Copyright: Reuters
Saints level! It is a cracking goal, created by a superb chest down from Graziano Pelle into the path of the charging Steven Davis, who makes no mistake with a low drive past Asmir Begovic.
It is a reward for a positive display from the away side in the last 10-15 minutes. It shows Chelsea's frailty and could well expose their lack of confidence. This is a big test now for the Blues.Copyright: Getty Images
Sadio Mane is fouled again by Ramires, who seems to have overstepped the line once too many.
Oh, what a chance for Ryan Bertrand, who is given a clear sight of goal by Sadio Mane's superb ball into the box only to be denied by the onrushing Asmir Begovic. It is a very good save, but the former Blues defender should have done better with his finish.Copyright: Reuters
Much to the delight of the Southampton fans, Graziano Pelle is awarded a free-kick for a foul by Gary Cahill 40 yards from the Chelsea goal.
The away side are close to turning the ironic cheers into legitimate ones as the free-kick is steered back across goal by Virgil van Dijk before Gary Cahill puts it behind. After the initial corner is cleared, Sadio Mane's deflected return has to flciked behind by the diving Asmir Begovic. A second corner comes to nothing.
Nervous times for Chelsea.Copyright: Reuters
- Copyright: Opta
Diego Costa serves the last of his three-match suspension today, meaning this is a real chance for Radamel Falcao to put forward his case for a regular starting spot.
That is not really happening at the moment. He has had the fewest touches of any outfield Chelsea player, with just one of those touches coming where he could do any damage.
Is that another big penalty shout for Southampton? It is you know. Sadio Mane shows neat skills to nip away from ramires, who lunges a foot in and catches the boot of the Saints forward. Referee Robert Madley's hand was up briefly. He was going to give that for a second. That is two penalty shouts (good ones as well) that Chelsea have survived.
To rub salt in Mane's wounds, he is then booked for diving in another incident. So, if that was a dive, surely the first one was too if not a penalty? I'm confused.
- Copyright: AP
Willian is winning the Chelsea plaudits, and not just for his goal-scoring exploits...
Iregbenu Paul: Willian, forget the goals, is very important. He appears to be one of the lots that understands the gaffer.
Archie Small: Time for Willian to start being considered top quality - massively underrated.
Alfie Snow: Last season, I thought of WillIan as a weak link. So far this season, he has been our best and most consistent player!
It is not sticking for Southampton up front. Graziano Pelle is a passenger at the moment. And the attacking midfield trio of Chelsea are contributing far more than their Saints equivalents, not least of all, Eden Hazard, who is pelting around like an espresso-fueled whippet.Copyright: Getty Images
Almost 2-0 as Oscar and Cesc Fabregas exchange passes before the Brazilian curls an effort into the hands of Maarten Stekelenburg from inside the box.
Soon after, Ryan Bertrand gets a booking for kicking out at Willian following a tackle. It has not been a good day for ex-Chelsea players so far.Copyright: Reuters
Southampton make trouble for themselves with a loose Virgil van Dijk pass on the edge of the box that Cesar Azpilicueta is on in a flash. Fortunately for the Saints (and their centre-back) Chelsea are unable to fully capitalise.Copyright: Getty Images
- Copyright: Opta
He might not show it, but Jose Mourinho will be happy with his side's start so far.
They are dominating possession and while they have not exactly kept Southampton pegged back in their own half, they are constantly pushing and probing, while keeping the visitors at bay.
Again, Southampton are let down by a loose final ball as Graziano Pelle's forward pass fails to find Sadio Mane.
Down the other end, Oscar's shot from outside the box rises over the crossbar.
A nice move from Southampton just falls short as Dusan Tadic's pass into the box is just too heavy for the charging Graziano Pelle. They may be trailing, but Southampton are playing well.
- Copyright: Opta
How important is Willian to Chelsea at the moment? He has scored twice as many goals as any other Chelsea player this season in all competitions. That important.
This graphic does not do the goal justice, but the green arrows gives some indication of where Willian put that free-kick - inch perfect into the top corner. One to watch on Match of the Day later.
Steven Davis with a chance for Southampton in the box but his shot from an angle flies past the near post. Ronald Koeman puts his hand to his brow in frustration.
Southampton have had a few set-pieces with which to deliver a telling ball into the Chelsea box but have been unable to make anything of them. Virgil van Dijk thinks he has had his shirt pulled by Branislav Ivanovic from the most recent, but the referee gives nothing.
They have just shown a replay and Ivanovic wasn't so much tugging his shirt as attempting to tear it shreds. That should have been a penalty.
- Copyright: Getty Images
Wow! Willian has the magic touch with free-kicks at the moment. He curls his effort over the wall, over Saints keeper Maarten Stekelenburg and in to the goal off the far post. That is his fourth free-kick goal in his last four appearances. And it could well be the most important of the lot.
Eden Hazard's first charge into Southampton territory sees him beat two before Oriol Romeu trips him to earn a booking and give Chelsea a dangerous free-kick.
Southampton win the first corner courtesy of Gary Cahill heading a Steven Davis free-kick behind. Tadic's delivery has some Chelsea hearts in mouths as Jose Fonte charged towards the ball, but keeper Asmir Begovic is there first. Panic over.
Dusan Tadic screams into the sky as Graziano Pelle's ball over the top is too late to keep him onside. The message is clear: quicker Graz, quicker.Copyright: Reuters
Graziano Pelle is fouled by Cesc Fabregas following a lay-off from the striker and Southampton have a free-kick on halfway. They are unable to make anything of the chance to pose problems to Chelsea, though, as a Steven Davis ball goes straight out of play.
Former Blue Oriol Romeu clearly has a point to prove. He snaps in to a tackle that fells Cesc Fabregas but does not stop Chelsea coming forward. The home side's attack does come to a halt when Radamel Falcao fails to keep the ball in on the byline.
The home side get the game under way...
A reminder, in case you needed one...Copyright: .
Here come the teams. The Blues led out by a very focused looking John Terry. A whole game of football coming your way very soon.
There's been plenty of protest around the Premier League grounds this afternoon in regards to the price of football tickets. Saints fans are joining in the "Twenty is plenty" campaign.Copyright: Getty Images
- Copyright: BBC
Mark Lawrenson thinks this match will end in a 2-1 Chelsea win. "Because they are at home, and because Southampton are not back at the level they reached last season, I am going to go for a Chelsea win," says our football expert.
Take on Lawro - and football fans from across the world - by having your say in all of this weekend's fixtures in our football predictor game.
- Quote Message: If we play badly or if we play well, we have to win. It will be a difficult match. from Willian
BBC Match of the Day commentator at Stamford BridgeCopyright: Rex Features
"This is a potentially awkward fixture for struggling Chelsea against a side who certainly look more together defensively.
"One more goal and the champions will already have conceded 15, the same number as in the whole of Jose Mourinho's debut season in 2004-05. In contrast, Southampton are unbeaten away in the league.
"Chelsea fans sang 'we want our captain back' following Tuesday's Champions League defeat. John Terry was an unused substitute again but was playing when Saints last won at Chelsea way back in 2002. His pace was questioned even back then.
"Terry's leadership qualities have never been in doubt, though, and Chelsea could certainly use some of that at the moment."
- Copyright: AFP
Not only has it been another tough week on the pitch for Chelsea, but matters remain bad off it as well. Ex-Blues doctor Eva Carneiro has revealed she was "at no stage" asked to testify by the Football Association over alleged derogatory remarks by Jose Mourinho.
Speaking in the news conference before today's match, Mourinho did not wish to discuss the controversy over Carneiro.
"For the last two months I did not open my mouth and I will keep like this. One day I will speak, and I will choose that day," he said.
Southampton make one change to the side that beat Swansea last week, with midfielder Oriol Romeu coming in for James Ward-Prowse to face his former club.
Southampton starting XI: Stekelenburg, Cedric Soares, Fonte, van Dijk, Bertrand, Romeu, Wanyama, Mane, Steven Davis, Tadic, Pelle.
Subs: Kelvin Davis, Yoshida, Long, Rodriguez, Martina, Ward-Prowse, Juanmi.Copyright: BBC Sport
And these are the Southampton players looking to throw another huge spanner into the Chelsea works and claim a first away win in 11 attempts - a run matched only by Newcastle in the current top-flight...
- Copyright: .
John Terry is back in the centre of defence for Chelsea, taking the place of Kurt Zouma. Under-fire Branislav Ivanovic retains his place at right-back. Ramires is in for Nemanja Matic, while Willian takes Pedro's place. Radamel Falcao starts up front, with Loic Remy dropping to the bench.
Chelsea starting XI: Begovic, Ivanovic, Cahill, Terry, Azpilicueta, Ramires, Fabregas, Willian, Oscar, Hazard, Falcao.
Subs: Zouma, Baba, Pedro, Remy, Matic, Blackman, Loftus-Cheek.Copyright: BBC Sport
- Copyright: Reuters
Jose Mourinho is no fool. He knows how big this game is. And I'm sure he would have chosen a different opponent to face in such circumstances.
Southampton are no pushover, having drawn all three of their away games in the league this season and keeping clean sheets in four of their six away games in all competitions.
Here is the magic formula (or formation, even) that Jose feels will unlock that precious win...
- Copyright: AP
So, it is official. This is the worst period of Jose Mourinho's career. A 2-2 draw at Newcastle last weekend left the champions with eight points from their first seven league games, which they followed with a 2-1 loss at Porto in the Champions League.
Sensing the chance to rub salt in the wound, Manchester City have just hammered Newcastle 6-1 to go 10 points clear of the Blues. To say that victory today is a must is the sort of understatement only a fool would fail to spot.
Welcome to our live page for Chelsea v Southampton. We'll have text commentary here from 16:30 BST, plus you can follow Final Score via the live coverage tab. You can keep up to date with all the reaction to today's games here.