Keep up to date on the Premier League game between West Ham United and Arsenal in our live blog.
FT | Game over at the London Stadium and Arsenal have lost for the fifth time this season! The Gunners are beaten in an absolutely terrible game away at West Ham, with youngster Declan Rice scoring the only goal in the match.
'87 | We're into the absolute finish of this match and Arsenal have been really lackluster tonight. They haven't created anything and it's probably the worst display from the Gunners since Unai Emery took charge of them.
'83 | DISALLOWED! | Arsenal finally manage to get the ball into the back of the net as Pierre-Emerick Aubameyang heads home from a Sead Kolasinac cross, but the full-back was miles offside and the offside flag went up rightly.
'78 | The London Stadium has sold out for the first time since West Ham united started playing at their new stadium. With the almost 60,000 people in the crowd, it's the highest ever attendance for a West Ham home game in their entire history.
'74 | No matter what might still happen in this game, Unai Emery will have quite a headache after this match. Arsenal have lacked inspiration and creatiity and they have been pretty unmighty in this match.
'70 | The third and final substitution of the afternoon for Arsenal and it's a man returning from injury. Hector Bellerín has recovered enough and he's hoping to play a part today as he replaces the unlucky Ainsley Maitland-Niles.
'67 | Quarter of this game left to play and it looks as if Arsenal are getting more serious. Aaron Ramsey flicks the ball through to Alex Iwobi and it's a tough angle for the winger, who fires the ball just wide of the West Ham goal.
'64 | And that's another big chance for The Gunners to get their equaliser. Sead Kolasinac crosses the ball to Pierre-Emerick Aubameyang and the striker has a big chance, but under pressure from Aaron Cresswell he fires wide.
'63 | Another opportunity for Arsenal to get back on level terms. Ainsley Maitland-Niles hands the ball to substitute Aaron Ramsey who manages to find Pierre-Emerick Aubameyang with a cross, but his header goes over the bar.
'59 | A double substitution for Arsenal as there's only half an hour left to play at the London Stadium. Granit Xhaka and Shkodran Mustafi are taken off by Unai Emery and they are replaced by Lucas Torreira and Aaron Ramsey.
'55 | That's pretty close for Arsenal. Michail Antonio hands possession to Mattéo Guendouzi with a poor pass and the French youngster manages to get space for a shot, but in the end it flies wide of Lukasz Fabianski's goal.
'52 | Arsenal will have to find a way to get back into this game, but they have looked absolutely awful today. Lucas Torreira has started his warm-up, but can he help the Gunners to start to fight back in this tough match.
'48 | GOAL! | West Ham - Arsenal 1-0. Rice! No shot on target in the first half, but after three minutes in the second West Ham have taken the lead. A Felipe Anderson cross drops for Samir Nasri, who pulls it back for Declan Rice who blasts home a delightful finish. 1-0.
HT | And that's the end of a disappointing first half at the London Stadium. West Ham and Arsenal are both still waiting for their first shot on target, but after 45 minutes it's still goalless in the east of London.
'43 | West Ham have not been the lesser side in this game and they feel that their might be a result in it for them today. Felipe Anderson finds Pablo Zabaleta on the overlap, but his low cross is intercepted by Sead Kolasinac.
'39 | It's the second meeting between West Ham and Arsenal this season as they met earlier in the reverse fixture at the Emirates Stadium. Back then it was the first ever win for Unai Emery as the new manager, as they beat the Hammers 3-1.
'35 | And that's the best opportunity Arsenal have managed to get up to this point. West Ham allow Arsenal a lot of space in attack and Matteó Guendouzi unleashes a dangerous attempt, firing only narrowly wide.
'32 | That's the closest one of both teams has been to opening the scoring in this game. Samir Nasri takes a moment before laying the ball off to Felipe Anderson, who sends a powerful strike only inches wide of the Arsenal goal.
'29 | West Ham are getting more dangerous and at the moment they look the most likely to open the scoring in this game. Felipe Anderson picks out Marko Arnautovic inside the box, but his shot is blocked by Sokratis.
'26 | That would have been some debut for Samir Nasri. He picks out Marko Arnautovic and the striker plays a cutting pass back to the Frenchman, who attempts a low shot but sends it into the side-netting.
'24 | We're halfway through the first half and we're still waiting for the first shot on target in this game. After this match there are some tough matches ahead for Arsenal: home games against Chelsea (Premier League) and Man United (FA Cup).
'20 | There's a familiar face starting for West Ham today. Samir Nasri has returned after an 18-month doping ban, but at the first of January he signed for the Hammers and today he's playing in the Premier League for the first time since August 2016, facing his former side.
'16 | West Ham have done well against the big teams in the Premier League this season and they might offer Arsenal a tough afternoon. Aaron Cresswell takes the ball past Ainsley Maitland-Niles and crosses it, but Bernd Leno intercepts.
'13 | Arsenal are putting up the pressure and that could have been the opening goal. Alexandre Lacazette accelerates and goes past Declan Rice and Angelo Ogbonna, before having a low shot saved by former Arsenal goalie Lukasz Fabianski.
'9 | The first dangerous moment for Arsenal. Granit Xhaka hoofs the ball long and it is picked up by Alexandre Lacazette, who gets a lot of time and space to try a volley that flies quite a long way over the West Ham goal.
'6 | That's the first shot on target of the afternoon. Michail Antonio only just keeps the ball in play before handing it to Mark Noble. The captain works out a one-two with Samir Nasri before trying a shot with his weaker left foot, but it's an easy prey for Bernd Leno.
'4 | In the early minutes of the game West Ham have had more of the ball, but they've not been able to get it into the danger zone. They're moving it around at the back and there have been a few poor passes, but Arsenal haven't been able to punish that.
KICK-OFF | A new Premier League matchweek is underway and we kick off with a London derby. Arsenal are hoping to keep the pressure on the top four, but the Gunners are up against a difficult task as they face an away game at West Ham.
XI West Ham | Fabianski; Zabaleta, Diop, Ogbonna, Cresswell; Noble, Rice, Antonio, Nasri, Anderson; Arnautovic.
XI Arsenal | Leno; Koscielny, Sokratis, Mustafi; Maitland-Niles, Guendouzi, Xhaka, Kolasinac; Iwobi, Lacazette, Aubameyang.