Arsenal go within four points of the Champions League places with victory over champions Leicester.
Robert Huth hands the Gunners late win after Nacho Monreal's deflected shot.
Middlesbrough prevail in tees-wear derby against Sunderland after early Marten de Roon goal.
Boro six points from safety. Black Cats 12 points adrift of 17th and can be relegated this weekend
Recap: Crystal Palace vs Tottenham Hotspur
Arsenal celebrate a crucial goal in their top four pursuit.
Full time: Arsenal 1-0 Leicester City, Middlesbrough 1-0 Sunderland
Just a single goal settle our two 7:45pm kick-offs.
One came early via Marten de Roon to give Middlesbrough victory in the tees-wear derby over a doomed Sunderland.
And the other came very late as Robert Huth's own goal delivered victory over Leicester for Champions League chasing Arsenal. They go sixth in the table, four points adrift of fourth.
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Arsenal scramble it clear in the final minute as Leicester push hard. Mahrez's cross finds Okazaki but Koscielny makes the block.
Four added minutes in north London. Handbags at dawn as Fuchs throws the ball at Alexis Sanchez who collapses to the floor despite his striking him on the shoulder. Embarrassing.
Ball in the net for Arsenal but Mesut Ozil is adjudged to be offside. Approaching stoppage time at The Emirates. Leicester have been stung at the death once again.
GOAL! Arsenal 1-0 Leicester (Robert Huth own goal)
A goal. A real goal. Nacho Monreal swings a boot at a loose ball and it strikes Robert Huth and flies into the corner of the Leicester net. For the record the Monreal shot was going well wide. So cruel.
Arsenal want a penalty as Ndidi challenges Ozil, but Jon Moss points for a corner. A sign of the desperation around The Emirates.
Benalouane puts his studs into the back of Giroud and is lucky to escape with just a booking. Frankly, that should be a red. Ten minutes left for the Foxes to hold on.
Laurent Koscielny down with a knee problem. Arsenal have made all three of their substitutes and he looks in a fair amount of bother. Looks like he slipped on his left knee. Similar to Zlatan Ibrahimovic's from the other night.
Giroud and Ramsey on for Coquelin and Walcott. Final throw of the dice by Arsene Wenger.
Jamie Vardy causing a constant threat to Arsenal's back four.
And now a change for Leicester as Okazaki replaces Ulloa.
Welbeck of course scored the stoppage time winner against Leicester last season. Can he repeat those heroics, though I would guess his manager might fancy a slightly earlier intervention.
Kieran Gibbs off and Danny Welbeck on for Arsenal.
Sanchez shoot straight at Schmeichel. Better from Arsenal but they look devoid of ideas. Theo Walcott in particular is having a shocker.
Schmeichel gets a big paw on the ball to prevent Xhaka's deflected shot from giving Leicester the lead.
Sanches denied by Huth as Arsenal finally go forward with some thrust. Schmeichel remains untested in this second half however.
Wilfred Ndidi heads a long Leicester throw straight at Cech. The better chances have certainly gone to Leicester. Arsenal still have woken up.
Goalmouth action few and far between at The Emirates.
Back underway in north London and at the Riverside, where the only goal in tonight's game has occurred. Let's hope it isn't the only one.
Players back out for the second half at The Emirates. Can we have a better second half, please?
Half time: Arsenal 0-0 Leicester, Middlesbrough 1-0 Sunderland
Alexis Sanchez rattles the crossbar for Arsenal as the half-time whistle goes. A rare moment of excitement in a dreary first half.
Theo Walcott has passed up several chances to shoot, displaying his lack of confidence at the moment. It might take a Leicester goal for them to sharpen up.
Ok I'm going to say it, not a lot is happening in any of our live Premier League games. Leicester are doing a good job of frustrating Arsenal, whose attacks are lacking flow and creativity.
Meanwhile, news from Spain where Barcelona have gone three points clear in La Liga with a 7-1 win over Osasuna. No hangover after the late Clasico win then?
At an effort of substance from Arsenal. Theo Walcott makes a foray into the box and toe-pokes towards goal, forcing Schmeichel into a low save.
Arsenal so close to taking the lead again when Gabriel flicks on a the near post and Fuchs hacks clear just before Monreal can pounce. Leicester holding on at the moment.
Petr Cech makes a fine save to keep the score level. A long throw from Leicester isn't dealt with by Arsenal and Mahrez swings a left foot and produce a fine save from the ex-Czech Republic international.
Frustration emanating from the Sunderland end, mid-way through the first half.
The Gunners starting to warm up. Francis Coquelin tests Kasper Schmeichel from range and the Dane has to push the ball behind. Granit Xhaka tries to replicate the effort, but he balloons his shot into the crowd.
Marten De Roon celebrates giving Middlesbrough an early lead.
Nothing to get excited from an Arsenal point of view in these opening 15 minutes. A strange line-up named by Arsene Wenger, one that won't have played together much before.
GOAL! Middlesbrough 1-0 Sunderland (Marten de Roon)
Leicester all over Arsenal in the opening minutes. A poor Albrighton free-kick is given away by Ozil and the ball comes to Vardy, who finds the side-netting from close range.
Underway in our two 7:45pm kick-off.
Teams out in north London and in the north east. Kick-off fast approaching.
London Calling bellowing around The Emirates before kick-off. The north London derby is on the horizon on Sunday, but Leicester are tonight's challenge. Big night ahead for Wenger and co.
One factor worth remembering regarding Leicester; they have not played in the last eight days. Though a big break did Southampton no favours last night, as they were turned over 4-1 last night.
In our other game, Middlesbrough host Sunderland with both sides doomed to relegation from the Premier League. Both sides are cut adrift at the bottom and can already start preparing for life back in the Championship. How either side rouse themselves one last time?
Pressure is certainly off Leicester tonight with their safety all-but secure. But a win would surely confirm Craig Shakespeare's retention as manager beyond the end of the campaign, wouldn't it?
Don't be fooled into thinking these are the only games to get your teeth into tonight. At Selhurst Park, Tottenham travel to Crystal Palace hoping to keep their title hopes alive. They kick-off at 8pm in south London and you can follow all the build-up and match coverage here.
Arsenal back at The Emirates for the first time in three weeks. One man is particularly happy.
And here are the teams for the most depressing clash in the Premier League's recent history.
Craig Shakespeare: "Leo's looked sharp in training now he's back from injury. Did well second half vs. Atlético, so he starts tonight. We've trained well in the last week so we're confident, but we don't underestimate the challenge posed by a team like Arsenal."
Four changes for Arsenal after their extra-time exploits in the FA Cup. Kieran Gibbs, Francis Coquelin, Theo Walcott and Hector Bellerin come in as Wenger retains the 3-4-3 formation.
As for Leicester, they make two alterations from the draw with Atletico. Wes Morgan is replaced by Robert Huth, while Leonardo Ulloa comes in for Shinji Okazaki.
Teams are in from The Emirates...
Arsenal can ill-afford any more slip up if they want to grab an all-important Champions League place. There is a seven point gap with the Gunners having games in hand over all the teams above them. Failure to win tonight however, ahead of facing Tottenham on Sunday, would surely be fatal.
Match programme for the game at the Riverside tonight. Emotional evening ahead.
And what about Middlesbrough and Sunderland who contest tonight's basement clash?
Gaston Ramirez, who was sent off against Bournemouth, and goalkeeper Victro Valdes are both unavailable. Martin de Roon and Grant Leadbitter are however in contention for the hosts.
For the Black Cats, Sebastian Larsson is suspended for Sunderland but full-back Billy Jones is ready to return.
How are we expecting both sides in our featured game at The Emirates to line up tonight? Teams should be with us at around 6:45pm....
Alex Oxlade-Chamberlain is the only fresh injury concern for Arsenal, who are without five other first team players including Santi Cazorla and Lucas Perez.
Leicester are without Wes Morgan and Islam Slimani due to hamstring and groin injuries. Papy Mendy won't play again this season after ankle surgery. Robert Huth returns after his European ban.
Night two of this bonus Premier League mid-week offering and tonight is all about belief. In north London, Arsenal will hope to build on reaching a record 20th FA Cup final by breathing new life into their Champions League qualification hopes again rejuvenated Leicester. Craig Shakespeare has no guarantees over his future heading into next season but having guided the club away from relegation trouble he will be hoping to convince the owners he can be fill the position adequately on a long-term basis.
Meanwhile, in the north east 'hope' has an altogether different and perhaps trivial meaning as 19th place Middlesbrough host 20th place Sunderland in a fixture which is likely to be consigned to the Championship next term. If either club has any ambitions of survival they had better start with a win tonight otherwise their top flight existence is all but over. And in the week arch rivals Newcastle United secured a return to the Premier League, the tees-wear derby gives a chance for both sides to remind everyone the Toon are not the only club in the north east.
All the team news and build-up ahead of the 7:45pm kick-offs on the way.
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