And that is that. Boos greet Arsenal. What a defensive display from Southampton. What a performance from Fraser Forster. Arsenal now five points behind Leicester. Plenty for Arsene to think about. I'll leave him to it.
- Arsenal XI: Cech, Bellerin, Gabriel, Koscielny, Monreal, Flamini, Ramsey, Campbell, Ozil, Sanchez, Giroud
- Southampton XI: Forster, Soares, Fonte, Van Dijk, Bertrand, Wanyama, Romeu, Mane, Ward-Prowse, Tadic, Long
- Use play icon to watch 5 live Final Score
Hector Bellerin crosses, Fraser Forster claims. He looks every inch an international player, the Saints keeper. Lucky England.
Four minutes of the added time are up. Laurent Koscielny blazes a pass straight out of play.
Superb work from Saints defender Virgil van Dijk, who runs deep in to Arsenal territory to win his side a throw-in and the chance to eat up vital seconds.
Gabriel is into the book for a foul on Matt Targett. It gives Southampton a dangerous free-kick on the left but Arsenal are able to keep it out.
Soon after, down the other end, Fraser Forster saves a low shot from Aaron Ramsey.
The board is up... six minutes to be added.
Shaman Hussain: Sad to say, but this is just typical Arsenal. Giving you so much belief, slowly building hope and then crushing that belief during February. Being an Arsenal fan is not good for your health, that's for sure.
More substitutions. Arsenal send on Francis Coquelin for Mathieu Flamini and Southampton replace Sadio Mane with Matt Targett. Coquelin's first act is to get a booking for a foul.
How have Arsenal failed to score? I'll tell you how in two words: Fraser Forster. Mesut Ozil is denied by a sliding challenge from Virgil van Dijk, diverting the ball to Alexis Sanchez, who is eight yards out but cannot beat the away keeper.
Graziano Pelle is already on for Southampton in place of Dusan Tadic. And now Ronald Koeman sends on Juanmi for James Ward-Prowse. The Saints boss seems to be eyeing a win.
Yet again, Fraser Forster is called into action to tip Olivier Giroud's header from a free-kick over the bar. Like a red rag to the ire of the home fans, Mesut Ozil's corner is easily headed away.
Southampton are screaming for a penalty as Shane Long's hooked shot strikes Gabriel. Difficult to tell if it was a hand but the defender was very close to Long. The striker seemed convinced, though.
Liam Grayhurst: Typical of Arsenal to choke on the prospect of a title challenge when we are nowhere near the business end of the season.
Jose Fonte has been in the wars today for Southampton, no more so than now as a clash of heads leads to him needing his head patching up. It eats up a fair few minutes, meaning we should get plenty added at the end. That'll make things more dramatic.
It just won't go in for Arsenal. Alexis Sanchez turns in the box and shoots low towards goal but it does not find the net thanks to James Ward-Prowse, perfectly placed to hack off the line.
Oh, Laurent Koscielny! What a chance for the Arsenal defender. Mesut Ozil's cross is pinpoint to find him six yards out but he heads over.
Fraser Forster to the rescue again! Theo Walcott has acres of space on the right side of the box but after blocking his first effort with his boot, the Saints keeper palms away his second. Soon after, Alexis Sanchez's header towards the far post is tipped away by the big keeper.
Forster is again called into action but it is a comfortable save from Alexis Sanchez's header.
The more Arsenal press forward here the more space Southampton have to break. Sadio Mane has twice threatened to do just that in recent minutes. It is a dangerous game for the Gunners to be playing, but then what choice do they have?
Campbell has done nothing. He goes off and on comes former Saint Theo Walcott.
The biggest cheer of the night greets a yellow card for Cedric Soares after he fouls Alexis Sanchez. The Gunners were looking to break after Oriol Romeu had seen a shot from range blocked.
Are we about to see an Arsenal change? Looks like Theo Walcott. It was inevitable really because the Gunners look very short of ideas and even shorter of any penetration.
Eamon McGurk: Sorry but Flamini isn't good enough to play midfield in a team serious about a title shot!
Abdul Said: For 7 minutes Southampton have not touched the ball other than defending and Arsenal can't score.
Kiriama16: They say Giroud ain't a title winning striker. Is that the case Olivier?..
Giroud header. Forster save. The French striker has Jose Fonte all over him but steers the ball towards goal but the Saints keeper has made tougher saves than that already tonight. That isn't troubling him.
Southampton have a chance to break courtesy of a misplaced pass from Gabriel (not his first). Sadio Mane drives to the edge of the home box but his low shot is straight at Petr Cech, who saves.
Another chance for Arsenal. Alexis Sanchez plays a superb pass to find a lovely run to the byline from Mesut Ozil but his pull-back evades everyone in the box. Agonising for Wenger's side.
Arsenal have started this half strongly. Joel Campbell looks to turn and shoot in the box but the ball just gets away from him.
Another big save from Fraser Forster! Arsenal pour forward and Olivier Giroud is found by Aaron Ramsey. The French striker's curling shot from just inside the box is destined for the top corner until Forster's outstretched hand tips the effort away.
No goals so far, but no shortage of interest. The game is back under way.
Chris Burch: Arsene Wenger needs to earn his corn and get these boys going in the second half or kiss goodbye to Arsenal's title hopes!
Arsenal have the majority of possession but have not been able to make it count. And when they have managed to break the away defence down they have found Fraser Forster equal to the task.
Arsenal have had most of the ball and the two best chances, but Southampton have pressed and for long periods have looked the more threatening. It is intriguingly poised.
Ian Funnell: Another home game that Arsenal are slow to get into. Why can't Wenger get this lot fired up for games?
Scramble! A cracking Arsenal move down the right gives Joel Campbell space to drive in to, turn and then cross low for Mesut Ozil but the away defence gather in a flash to block and hack the ball clear.
Jose Fonte shows good strength to prevent Olivier Giroud getting a header on target as the striker dived in to meet an Alexis Sanchez cross. It is a corner, but again the away side do well to clear. Gabriel gathers the ball again but is forced to go backwards.
Southampton win another corner. It goes short to Dusan Tadic but he is unable to get a decent cross in. However, Saints come again and Sadio Mane gets behind the home defence but cannot get a shot on target under pressure from Gabriel. It is another warning for a home side who look completely out of sorts.
Hats off to Southampton. They are neutralising the Arsenal threat superbly. And to sum up the home display, Aaron Ramsey swings a pass from right to left and straight out of play.
Southampton are getting close. Oriol Romeu beats Petr Cech with a curling, dipping effort from the edge of the box but also beats the crossbar by a yard.
Southampton's first real effort on goal comes from Dusan Tadic, who is found on the edge of the box by Sadio Mane but can only curl a tame effort into the arms of Petr Cech.
Shane Long is a very willing runner for Southampton, but after chasing to collect a long ball forward his cross is poor and goes straight out of play for a goal-kick.
There are echoes of Southampton's last game in this performance. They held Man Utd at bay and then hit on the break late on. Arsenal will be very keen to put any such danger to bed as early as possible. At the moment it is just not happening for them, though.
Mesut Ozil should have scored earlier. He really should have scored here. Olivier Giroud's header in the box falls to him on the edge of the six-yard box but his poked shot is tipped past the post by Fraser Forster.
In fairness, if he had scored, Southampton would have questioned why the assistant's flag hadn't gone up for offside against the German.