Showing that he is over his start of season dip in form with some fine saves, but could do nothing to stop the Arsenal goals.
The American retained his place in mdfield but although he tried to support Cole upfront - he was often needed to counter the threat of the Arsenal.
Made a shaky debut for the Hammers. Was caught napping for the second goal as Walcott nipped in to slot the ball past Green and then gave away the penalty in the second half. Forced off injured late on.
It's unsure if the centre back will be at upton park for much longer with reported interest from his former team - but still continues to be Mr Reliable for the hammers- putting in another solid performance despite the defeat.
Came in for the injured Scott Parker and although he made some crucial tackles in the first, he could not compete with the quality of the visitors.
Starting to build a good relationship alongside Upson in the centre of defence, but gave the ball away needlessly in the first half.
Barely lasted 20 minutes after picking up an injury. Didnt get going and was sloppy in possession.
The Frenchman slotted in at right- back again and produced a fine clearance in the first half, nicking the ball off the head of Wilshere. Booked for a late tackle on Fabregas.
The youngster continues to impress with his runs down the right. Produced a good cross in the first half for Cole who headed well. Substituted in the second.
The youngster came into the side replacing Frederic Piquiobnne and looked lively down the left. Almost scored in the first half but his shot from an acute angle flew just over the bar.
The striker was restored to the starting line-up after coming off the bench in midweek to score the winner against Birmingham, but was kept quiet. Lacked any real service.
Kept his place in the side after the midweek game against Ipswich, with Fabianski being forced to sit out with injury. Rarely troubled by the Hammers.
Kept his place at right-back with Sagna still suspended and did well to counter the threat of Hines down the left.
The Hammers barely threatened the Arsenal backline but the young defender kept his concentration and was always on hand to clean up any potential threat.
Proving to be one of Wenger's first choice centre-backs in the absence of Vermaelen and the Swiss defender put in another solid performance and managed to keep Carlton Cole quiet.
Managed the Hammers' attacking threat well while creating an outlet for the Gunners down the left.
The captain was the one of the quieter players for Arsenal today, but still managed to break up a number of home attacks and keep possession well. Substituted in the second half.
Returned to the starting line-up after being rested in mid-week, and provided some neat balls to link with the defence and attack. Substituted in second half.
Had too much quality for the home midfield to handle and managed to combine well with Van Persie and Fabregas for the majority of the game.
R. van Persie
Scored the Gunners' first and third goals on his return to the starting line-up and made the second for Walcott. Had a number of chances to score his hat-trick but none of them managed to find the net. Man of the match.
The winger was making his 100th Premier league appearance and created the first goal as his low cross was met by Van Persie at the near post. Managed to score the second just before half-time and then won the penalty in the second half after being tripped by Bridge.