Murray wins as Federer loses

1. Roger Federer out of Australian Open
2. Federer beaten by Andreas Seppi in four sets
3. Andy Murray beats Joao Sousa 6-1 6-1 7-5
4. The Scot will play Grigor Dimitrov in the last 16

Second seed Maria Sharapova plays 31st seed Zarina Diyas at 08:00 GMT for a place in the last 16. That match will be followed by third seed Rafael Nadal v unseeded Dudi Sela. And I'm pleased to say we will have live text commentary on both those matches coming up shortly. That's it from me, though, so until next time, it's good morning from me. See ya!

Well, no one saw a Roger Federer defeat coming did they? The Swiss, who last won the Australian Open 2010, must wait another year. His last Grand Slam title came back in 2012. Will there be more drama later on today when Maria Sharapova and Rafael Nadal are in action in the evening session?

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Rich: Felt all along that Seppi would eventually choke, but he held his nerve admirably. Got to think Federer is now in decline.

AP

"I just tried to enjoy playing on centre court again," said Seppi after his shock win over Federer. "It's not often you get the chance to play on centre court.

"I just tried to play my best and I did because I was playing Roger. You never feel comfortable playing against Roger, but I was focussing on my service game, I didn't have many chances on his serve."

Earlier in the day, 10th seed Grigor Dimitrov outlasted former finalist Marcos Baghdatis over five sets to set up a last 16 match against Andy Murray at the Australian Open.

Here's the developing report on Roger Federer's shock defeat in the Australia Open third round. Andy Murray had a little wobble in the final set, but was otherwise untroubled as he cruised past Joao Sousa.

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Andreas Seppi's reward for victory over Roger Federer is a meeting with either Malek Jaziri or Nick Kyrgios in the last 16.

Roger Federer, a 17-time Grand Slam champion, has not lost this early at the Australian Open since 2000, the second year he played here. It is also the unseeded Seppi's first win against Federer in 11 attempts.

Federer suffers shock defeat

Seppi conjures up a beautiful forehand winner to bring up match point. Is it all over for another year for Federer? Yes it is! Seppi pulls out a forehand from the very top drawer, while on the stretch I should add, to pass Federer at the net and secure an unlikely victory. As ever, Federer is gracious in defeat.

Oh the tension! Federer secures a mini-break with a backhand winner, but then throws it away with a backhand error in the next. At 5-5, the Swiss is now just two points from defeat.

We're straight over to the Rod Laver Arena where Roger Federer is on the verge of getting dumped out of this year's Australian Open. The Swiss lost the first two sets to Andreas Seppi but hit back to win the third. We're in a fourth set tie-break, with the pair locked at 4-4.

Murray will play Grigor Dimitrov in the last 16, the Scot aiming to amend for last summer's Wimbledon defeat by the Bulgarian when they meet on Sunday. The Bulgarian 10th seed needed five sets to get past Marcos Baghdatis earlier today.

"I was up two sets and 4-1, but he got back into it," says Murray. "He competed very well. He always does and made it difficult in the end, but it was a good match.

"I'm feeling pretty good so far. I have played three quite quick matches which helps, but you expect the matches to get a little tougher as you go through each round so if you can conserve energy, that's always good."

Game, set and match

Better from Murray in the first point, the Scot's aggressive play earning him the first point. But he hits too short in the next and Sousa whips the ball away for a winner.

The pendulum swings the other way as Murray somehow guides the ball back into court, when stretching on the run for 15-30, but Sousa responds well to level again.

Murray brings up match point. Sousa hits long, but is it long? Sousa wants to challenge, the Portuguese arguing with the umpire. But he eventually concedes and offers his hand to Murray. Victory, then, for the world number six but boy did he make it hard for himself in that final set.

Much better game from Murray, who flies through his service game to love in under a minute. That'll ease the frustration and quickly heaps the pressure onto Sousa, who will once again serve to stay in the match.

With a shadow now looming over most of the court, Murray chooses to ditch his baseball cap. The wardrobe tweak seems to help as he soon finds himself with two match points. Sousa saves the first with a forehand volley winner and is then relieved to see Murray dump a forehand in the net. Deuce.

Murray's frustration is clear, the Scot muttering to himself between points as he tightens up. A forehand sails long to gift Sousa game point. But back comes Murray, putting Sousa on the run and nailing a good passing shot which the Portuguese can't keep in play. Deuce.

Sousa punches the air and gives a glare up to his box as he wins the next two points to seal the game. On we go...

Can Federer survive scare?

Roger Federer is serving to stay in the tournament over on the Rod Laver Arena.

The four-time champion is 5-4 down in the fourth set against Italian Andreas Seppi, who leads by two sets to one.

Better from Murray, who finds his range again and motors to a 40-0 lead. But it's clear that the Scot is getting a bit tentative and Sousa takes advantage, winning the next two points. Danger averted in the next, as Murray fires a backhand down the line to move 5-4 clear and Sousa will now serve to stay in the match.

Sousa has found something from somewhere and it's Murray who is now doing all the scrambling. And out of nowhere, we're level in the third set as Sousa holds to 15.

Sousa breaks

Murray looked to be cruising at 40-15, but he throws in a double fault and a tame forehand and suddenly we're at deuce. Sousa takes advantage of Murray's dip in form, bringing up only his second break point of the match with some aggressive play. And would you believe it? Sousa breaks as Murray frames a forehand! The Scot throws his racquet down in frustration. We're back on serve.

The crowd erupts as Murray pulls off a sensational shot played through his legs, but Sousa is waiting at the net to put away the winner. The Portuguese carries the momentum to win his service game to love. That's only his fourth game of the match.

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Sam Barker: "This is a clinical Andy Murray, the likes of I can't remember having seen for a number of years. Coaching changes paying off."

Aidan Williams: "Murray looks like he's coaching Sousa. It doesn't even look like a competition."

Paul Collins: "Come on @andy_murray. He can win this Australian Open. Only Djokovic to really fear."

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Murray is racing towards the fourth round as he seals another love service game.

Murray breaks

Murray brings up two break points and you sense that if he converts one of them, there will be no way back for Sousa. Murray misses out on the first one, as Sousa puts away a smash, but he takes the next with a scintillating backhand winner. The Scot is now just three games away from victory.

Federer fights back

Four-time Australian Open Roger Federer is back in the game on Rod Laver Arena.

The Swiss has taken the third set 6-4 and now trails 2-1 in sets against unheralded Italian Andreas Seppi.

It's a clinical service game from Murray who sails through to love.

Piers Newbery

BBC Sport at Melbourne Park

"Sharapova, Nadal, now Federer…. some of the the biggest names have struggled at times this week in what is turning out to be a memorable first week. Federer looks to be on the way back against Seppi but a whopping 38 unforced errors has even the Swiss press here doubting whether their man can get out of this one. The question is whether Seppi, with a 0-10 record against the great man, believes he can finish the job."

Russell Fuller

BBC tennis correspondent on Radio 5 live sports extra

"Murray has only dropped two games so far and is two sets to the good. Latest tribute song from his 'choir' is to the tune of 'The lion sleeps tonight'."

It's like a training match for Murray out on Hisense, the Scot playing well within himself. Even when he's put on the stretch, which has rarely happened today, Murray has the answer, firing a backhand cross-court pass back to bring up break point. Sousa saves it to force deuce and the Portuguese's brave defence is rewarded with a game.

It's a change of colours for Sousa, who swaps his fluorescent green top for a white ensemble. It makes no difference to the flow of the match, though, as Murray races through his service game to 15, closing it out with an ace.

Game and second set

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Murray's coach Amelie Mauresmo looks very relaxed in the stands - and so she should be as her man is demolishing his opponent out on Hisense. Two loose forehands from Sousa gift Murray set point but the Scot touches the net, which is a foul, as he races to reach a drop shot and we're at deuce.

Murray cranks up the forehand, unleashing one down the line before picking off the return with a cross-court winner to bring up another set point. This time, Murray takes it as Sousa dumps a forehand in the net. This match could be over very soon.

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Murray's fifth ace of the match seals his service game to 15 and Sousa will now serve to stay in the set.

Around the courts

While Sousa receives treatment, here is what is happening elsewhere. Third seed Simona Halep has beaten Bethanie Mattek-Sands 6-4 7-5 while over on Rod Laver Arena, Roger Federer leads 2-1 with a break in the third set of his match against Andreas Seppi. However, Seppi leads by two sets to love.

Sousa has called the trainer. It looks like a problem with his left knee. Murray, meanwhile, is up off his chair and bouncing around during the medical time-out.

Murray breaks

It's just sensational ball-striking from Murray, who has hit 20 winners to Sousa's nine. The Portuguese world number 55 is doing everything he can to stay in the rallies, but he's struggling to generate any depth on his groundstrokes and Murray is just swotting him away at will. The Scot breaks again.

Murray's first serve percentage has been poor, but the rest of his game is looking supreme and he consolidates the break to love.

Federer two sets down

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Roger Federer is in a whole heap of trouble over on Rod Laver Arena.

The four-time champion loses a tie-break 7-5 in the second set and trails 2-0 against Italian Andreas Seppi (pictured).

Murray breaks

Murray on the attack from the off, the Scot seizing on a lose ball and whipping it away down the line. Nonchalant.

But back comes Sousa, the Portuguese winning a 19-shot rally to bring up two game points. The first goes wanting as he dumps a regulation forehand in the net and another error, this time on the backhand flank, brings up deuce.

Another game point disappears. Deuce again. Murray rustles up a break point, but it's his turn to make an error, sending a forehand agonisingly wide. Deuce.

Sousa wastes two more game points before Murray gets his second break point. This time, he takes it as Sousa's resistance falters. The Scot is cruising.

Gigi Salmon

BBC Radio 5 live sports extra commentator

"The only thing that is not working for Andy Murray at the moment is his first serve - it's not consistent enough."

Sousa snatches at a few forehands and before he knows it, Murray has raced away with the game. The Scot is well and truly in control on Hisense.

Big hold for Sousa, who wins the game from 0-30 down.

Piers Newbery

BBC Sport at Melbourne Park

"It's breezy to say the least on Hisense but Murray is well used to that and got a handle on conditions after feeling his way for a game or two.

"This court is non-ticketed for the first time, due to the shiny new Margaret Court Arena, meaning big queues and lots of coming and going at the changeovers as those with ground passes get to check out a Wimbledon champion (and the Portuguese number one). It's like People's Sunday every day on Hisense."

Federer struggling

Four-time Australian Open Roger Federer is up against it on Rod Laver Arena as Andrea Seppi breaks in ninth game of the second set and will now serve for a two sets to love lead. Remarkable scenes.

Piers Newbery

BBC Sport at Melbourne Park

EPA

"Seventh seed Tomas Berdych is safely through to the last 16 after a 6-4 6-3 6-4 win over Viktor Troicki on Rod Laver Arena. Watching from courtside was Dani Vallverdu, the Venezuelan coach who left Team Murray for Team Berdych in the off-season.

"I'm getting to a stage of my career, if I want to go forward and do better it's the right time to make some changes," Berdych told BBC Sport. 'I ended up with Dani, which is a great choice. I'm really happy with all the experience he has from the past, working with Ivan and being part of the team with Andy Murray. It's very helpful.'"

Game and first set

AP

It's all Murray at the moment, Sousa struggling to deal with the Scot's power as he is dragged from one side of the baseline to the other.

It's brutal hitting from Murray. Just brutal. The world number six mops up the game for the loss of just two points and the first set is his in a little of half an hour.

Murray breaks

Murray goes big at 15-15, launching a fizzing forehand down the line but he's shaking his head before it's even landed. But it's that aggression which is putting Murray in the box seat.

The Briton keeps the ball in court in the next two points to bring up break point. Sousa then hits wide and Murray breaks. He'll now serve for the set.

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Is Andy Murray a leading Australian Open contender? Let us know your idea of the winner by using #bbctennis posting on our Facebook page or by texting 81111.

Pratik Tarafdar: "May be not this time around. Federer, Djokovic, Raonic & Wawrinka are playing brilliantly. Then you also have Nadal."

Although Federer is currently a set down against Italian Andreas Seppi.

Sousa has not let his head drop after that break and bravely comes forward when given the opportunity to force deuce as Murray's serve continues to stutter. But the Scot comes through once more to win his third successive game.

Murray breaks

Murray nails a trademark backhand down the line to haul himself back to 30-30 on the Sousa serve.

The Portuguese then throws in a slow second serve and Murray takes advantage, rattling a forehand cross-court and then sending another sizzler of a backhand down the line to bring up his first break point of the match.

A great change of pace, following up a looping forehand with a flat and heavy backhand winner to seal the game. "Come on," roars the Scot.

Brit update

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It's been a morning of mixed fortunes for Great Britain on the doubles front. Britain's Jamie Murray and Australia's John Peers, the 16th seeds, beat Australian duo Omar Jasika and John-Patrick Smith 6-2 6-3 in round two.

GB's Dominic Inglot and Romania's Florin Mergea, the 14th seeds, beat Argentina's Diego Schwartzman and Horacio Zeballos 7-6 (8-6) 4-6 6-2.

However, Britain's Heather Watson couldn't continue that success as she and Russian Alexandra Panova (pictured) lost 6-0 6-2 to Russian 12th seeds Anastasia Pavlyuchenkova and Alla Kudryavtseva.

Murray follows up an ace with his first double fault of the match to allow Sousa back to 30-30. The Scot then finds himself facing a break point after Sousa latches onto a pretty tame second serve. Fear not, though, as Murray's first serve comes to the rescue for deuce.

It's all a bit erratic from the world number six at the moment, interchanging aces with double faults. But he conjures up two successive big serves to get him out of trouble.

So far so good for Joao Sousa, the world number 55 racing to 40-0 without doing anything spectacular. Murray gets a point on the board, but the Scot's backhand then lets him down and it's one apiece.

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Murray cruises through the opening game, the Scot sending a bullet of a serve down the middle to close it out to 15.

Joao Sousa wins the toss and elects to receive. Let's do this.

We've got a two-pronged attack on coverage for this match with David Law and the team providing online-only audio coverage. Just click the Live Coverage tab at the top of the page and hit play. Easy.

Around the grounds

Roger Federer is in a spot of bother over on Rod Laver Arena, the four-time champion losing the first set 6-4 against Andrea Seppi. I'll keep you up to date on the progress of that match, but for now we return to the Hisense Arena where Murray and Sousa are reaching the end of their warm-up.

Andy Murray slaps on the suncream, fits his cap and heads out to begin the warm-up. It's another beautifully sunny day in Melbourne, but at 22C not the hottest conditions we've seen this week.

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Do you agree with Goran Ivanisevic? Did Andy Murray make the wrong decision by splitting with Ivan Lendl? Everyone is entitled to their opinion, so let's hear yours using #bbctennis on Twitter, posting on our Facebook page or by texting 81111.

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Andy Murray has not reached a Grand Slam final since he won Wimbledon in 2013. Former Wimbledon champion Goran Ivanisevic has some thoughts on why his form has tailed off.

"He changed coaches," Ivanisevic told BBC Radio 5 live. "For me honestly that is maybe his biggest mistake, letting Ivan (Lendl) go, because it was a perfect match.

"They did everything well together, they won two Grand Slams, he played the best tennis under Ivan.

"They are similar tennis players but Andy is like Rafa (Nadal), a great competitor, a great tennis player. What he played last year, that was way off the standard of Andy Murray - overall it was medium, medium rare."

If Murray wins today, he will join Mats Wilander in 10th place on the list for the most Australian Open wins in the Open Era. However, that total of 36 would be 29 short of four-time champion Roger Federer's tally.

The players are out on court with Andy Murray sticking with his fluorescent green and dark coloured T-shirt and trainers combo. Bold.

BBC Sport

And what has Joao Sousa got to say? "I feel confident. I am playing good. He is one of the best for sure but it's going to be a good match. I have been working hard to increase my level."

Andy Murray on Joao Sousa

EPA

"He fights hard," says Murray of Sousa. "He has a great attitude. He doesn't have one massive weapon, but he definitely gets the most out of his game. He's physically in very good shape. He lasts the long matches well. He'll make it tough for me."

Around the grounds

EPA

The winner of this match will play 10th Grigor Dimitrov, who as you can see was pretty happy that he outlasted former finalist Marcos Baghdatis over five sets to reach the last 16 at the Australian Open.

The Bulgarian won 4-6 6-3 3-6 6-3 6-3 in three hours and 28 minutes.

Meanwhile, Canadian seventh seed Eugenie Bouchard beat Caroline Garcia 7-5 6-0 on Rod Laver Arena.

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Who is Joao Sousa I hear you ask? He's a 25-year-old from Guimaraes, who speaks Portuguese, Spanish, Catalan, English, French and Italian and would have been a football player or a doctor if he hadn't pursued his love of tennis.

Murray knows him reasonably well, having beaten the Portuguese player in their three previous meetings. The most recent loss came at the Australian Open last year, when Murray dropped just eight games to win their second-round encounter.

Sousa, 25, had a decent 2014, reaching a career-high ranking of 35, following his runner-up finish at Bastad in July and earned his first Grand Slam seeding at the US Open.

He is bidding to become the first Portuguese player to reach the round of 16 at a Grand Slam. However, he has lost his last eight matches against Top 10 opposition.

AP

It's been smooth sailing for Murray so far in Melbourne, the Briton winning his opening two matches in straight sets for the loss of just 19 games.

Tougher tests lie in store, though, with Roger Federer and Rafael Nadal potential opponents on route to the final, where four-time champion Novak Djokovic could be waiting.

But for now, Murray has Joao Sousa (pictured), the world number 55, to contend with.

Piers Newbery

BBC Sport at Melbourne Park

BBC

"The thermometer says 25C but it feels considerably hotter on day five at Melbourne Park, and there's the usual warm wind whipping around the grounds. Murray will not be too worried about the conditions as a veteran of regular lung-bursting training blocks in Florida, and he's looked sharp so far after a winter spent working on his speed. Today marks a return to the Hisense Arena, the third show court and somewhere he has played most of his tennis in Melbourne over the last couple of years."

Reuters

Morning everybody and welcome to our live text commentary of Andy Murray's Australian Open third round clash with Joao Sousa of Portugal.

We're expecting the pair on court shortly, but there's still time to stick the kettle on and raid the cupboards for some late night/early morning snacks in preparation.

Reuters

Chatter about twirling,menstrual cycles and the rise of female coaches has dominated the news agenda in recent days - but there's only one story in town today and it involves Britain's lone representative in Melbourne, Andy Murray.