Full-time here at the Emirates as the hosts left it late but they still walk away with all four points as Monreal's goal was cancelled out by Arnautovic but Lacazette scored two late goals and Ramsey got one to see it end Arsenal 4-1 West Ham.
GOAL! Arsenal make it four! Lacazette finds some form before the all important Europa Semi on Thursday as the ball is spread wide for Ramsey and he slips the ball in the box for Lacazette who turns and scores!
Substitution for the hosts as Welbeck makes way to a standing ovation and Chambers comes on to replace him.
Substitution for the visitors as Masuaku makes way for Andy Carroll.
GOAL! Arsenal make it three! Lacazette puts his name on the score sheet as Arsenal patiently move the ball around the edge of the area and Welbeck then feeds Aubameyang who slips it to Lacazette who smashes home via a deflection.
GOAL! Arsenal are back in the lead! Aaron Ramsey with an odd goal to say the least, Arsenal's break looks just about over as Ramsey crosses from the left flank and Rice ducks under the ball and it just drops into the net.
SAVE! Another phenomenal stop from Hart after a patient build-up from the Gunners, Welbeck creates space on the left corner of the box and he bends a shot that looks destine to nestle the net but Hart again tips it around the post!
The tide appears to have turned in Arsenal's again, with the Gunners mounting attack after attack in search of a second, West Ham offering a slight threat on the counter.
Yellow card issued to Mustafi as he comes through the back of Hernandez.
SAVE! It's a save out of the top drawer from Hart, as the Hammers defense backs off of Xhaka and he lets fly from 30 yards and Hart gets down extremely well to tip it around the upright!
Substitution for Arsenal as Aubameyang, who has scored five goals in five home game for the Gunners, comes on to replace Iwobi.
GOAL! West Ham equalize! Ospina clears Masuaku's cross well and the ball falls kindly for Kouyate who sees a shot blocked, then the ball falls for Lanzini and he lifts it to Arnautovic who smashes a volley into the bottom corner!
YELLOW! Maitland-Niles catches Noble late with a high challenge and picks up a booking.
CHANCE! Lanzini sends in a wonderful cross from a free-kick and Hernandez is found in space but can't quite get the right connection on the header and it flies wide, would have been a fantastic double substitution from Moyes if that went in.
Here comes the substitutions as Fernandes and Joao Mario make way for Lanzini and Hernandez.
CLOSE! Ramsey plays Iwobi into space down the right and he plays the ball back to the Welshman immediately on the edge of the area, but the pass is just behind Ramsey and his shot drifts wide.
Looks like Hernandez and Lanzini are being ordered to ready themselves for action by David Moyes..
Arsenal go in search of a second as that solidity in West Ham's play slowly ebbs away. Lacazette wriggles away from two defenders in the area before seeing a shot deflected behind, as the pressure begins to mount.
GOAL! Arsenal take the lead after a Xhaka corner is met first time by Monreal on the penalty spot as he smashes home a left footed volley into the bottom corner!
Yellow card issued to Zabaleta as Welbeck broke extremely quickly with Lacazette in company following a Hammers corner. The Argentine without the tackle would have seen a 2 on 1 in the favour of the Gunners.
CHANCE! Arsenal create their best opening of the game as Welbeck chests Lacazette's cross into the path of Monreal who lashes a low shot straight at Hart. So nearly the perfect start to the second half for the Gunners.
Good news coming off the Arsenal bench as Elneny has nothing broken or too seriously damaged but he has rolled his ankle.
No changes for either side as the Hammers get us back underway for the second half!
Half-time here at the Emirates and it feels as if the Arsenal fans don't know how to act with the imminent departure of Arsene and the upcoming Europa League semi's, nevertheless we enter the break Arsenal 0-0 West Ham.
And unfortunately Elneny needs a stretcher and a brace for his left leg to get off the field following that clash, and he eventually makes way for Maitland-Niles.
Elneny looks in some discomfort after he was brought down on the edge of his own box as Arsene readies Maitland-Niles as his replacement.
Yellow card issued to Xhaka after he slid in with two feet on Masuaku.
Lacazette floats towards the back post for Welbeck to attack but there's just too much on the cross for the striker to create anything substantial.
CHANCE! Bellerin hurtles down the right flank and whips a great ball into the area which finds Welbeck at the back post, but the striker mistimes his jumps, gets under the ball and heads wide.
SAVE! Xhaka whips a great free-kick up and over the West Ham wall but Hart sees it all the way and palms it clear.
Rice hacks Welbeck down on the edge of the area, referee Mason plays advantage as Lacazette lashes a shot wide, but the Frenchman is a yard offside so play is pulled back for the original foul.
Welbeck picks up the ball in midfield, plays a one-two with Elneny before unleashing a shot from 25 yards which curls woefully wide of the target. I must say, I can't remember an occasion when Welbeck has scored from such a position.
Fernandes is putting in a real shift for West Ham both in defence and attack. His latest foray sees him dispossess Monreal and drive up to halfway before the Arsenal defender brings him to ground.
CLOSE! Monreal wriggles clear of Fernandes on the left before shifting the ball inside to Welbeck. He's encouraged to shoot by the home faithful, which he does, sending a low effort inches wide of the target.
CHANCE! Masuaku's clearance hands possession to Welbeck in an advanced area, the England forward cuts inside Masuaku's desperate attempt to make amends and lay the ball off to Bellerin, but his finish leaves much to be desired and sails over the bar.
Arnautovic fends off Koscielny to brilliantly hold up play before laying the ball off to Fernandes, who wildly blazes a shot over the bar.
BAR! Arsenal are all at sea at the back and they nearly fall behind as Kouyate steers West Ham's corner onto the top of the crossbar with his shoulder
CHANCE! Arnautovic gets in behind the Arsenal defence for the second time in as many minutes, bullying Mustafi on the left before drawing a fine save from Ospina from a narrow angle.
CHANCE! What a spell this is proving to be for West Ham! Arnautovic is the latest player to be played in behind but after bundling his way into the area, Mustafi blocks his shot.
SHOT! West Ham register the game's first attempt on target as with a low strike from the edge of the area, but Ospina gets down low to his left to keep it out.
CHANCE! West Ham slice through the Arsenal defence like butter but Mario's threaded pass for Fernandes is ever so slightly over-hit, and the a glorious chance slips throw their fingers.
CLOSE! Another Arsenal corner is whipped in by Xhaka and this time Koscienly climbs higher than Kouyate on the penalty spot but his shot just slides wide of the upright.
Xhaka puts the ball into a dangerous area where Rice and Welbeck compete, the former wins the aerial duel with a towering header clear.
Elneny wins Arsenal a cheap corner as he picks the ball off Masuaku and then kicks the ball into Cresswell and it rolls out for a corner.
This is Wenger's penultimate league match at the Emirates before they travel to Burnley on the 6th of next month, as Arsenal begin on the front foot as they just move the ball around the park patiently.
Lee Mason blows his whistle for the first time and we are underway at the Emirates Stadium!
West Ham boss David Moyes has almost clinched Premier League football next year but it isn't time for them to stop looking for points as he names an unchanged lineup from the side that drew 1-1 against Stoke on Monday.
With Arsene Wenger announcing his retirement at the end of the season the players will be looking to put on a performance not only for the league table but as a tribute to their long standing manager.
Hammers XI: Hart, Creswell, Ogbonna, Rice, Zabaleta, Masuaku, Noble, Kouyate, Fernandes, Joao Mario, Arnautovic.
Bench: Adrian, Evra, Cullen, Carroll, Hernandez, Hugill, Lanzini.
Arsenal XI: Ospina, Bellerin, Mustafi, Koscielny, Monreal, Elneny, Xhaka, Welbeck, Ramsey, Iwobi, Lacazette.
Bench: Macey, Chambers, Holding, Mertesacker, Maitland-Niles, Aubameyang, Nelson.
Good afternoon and welcome to our coverage of this Premier League clash between Arsenal and West Ham, from the Emirates Stadium.
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