West Ham took the lead when Mohamed Diame beat Vito Mannone with a curling shot. Giroud equalized before the break when he poked Lukas Podolski's cross at the near post. Kevin Nolan missed two chances for the hosts and were made to pay when Theo Walcott came off the bench to make it 2-1 with Santi Cazorla third hit.

Walcott, who replaced Gervinho disappoint, helping the Gunners to take advantage in the last half hour as West Ham tired. But after being on top for most of the game, it was no more than the team Arsene Wenger deserve because they extend their unbeaten run against West Ham to nine games and moved into fifth place in the Premier League. Sam Allardyce's side had to defend assertive throughout the game but they came up against another midfield run by Cazorla impressive. and disappointment they lost their first Premier League home games this season compounded by injuries to forward Ricardo Vaz Te, who went with suspected shoulder dislocation. Walcott and Cazorla final destination within six minutes gave the scoreline a gloss adds Andy Carroll caused concern in the visitors' defense on the first start since suffering a hamstring injury striker

But the result was the perfect response to defeat the Gunners' by Chelsea last weekend and that means only one league defeat of the season so far.

Carroll also underlined the value of when he spent much of the first 20 minutes as the Hammers defense reinforce Arsenal squandered a promising opportunity. Giroud almost scored within the first two minutes when Jussi Jaaskelainen tipped his shot round the post and Carroll's goal-bound effort blocked the French striker then in the first round. So, when the West Ham goal came on 21 minutes it was something of a surprise. Diame fed by George McCartney to the left and skipped past Senegal player Aaron Ramsey before curling finish into the far corner for fun Palu his first goal. Referee Phil Dowd booked the midfielder Diame for celebration and perhaps lucky to stay on the field as soon as he dropped Mikel Arteta.

Then, just as Carroll began to become more influential in the attacking half, Diame has a pocket to take in midfield led to the equalizer. The ball was swept to Podolski on the left and Giroud exploded near post cross to tuck in Germany for the purpose of a true hunter. Having got themselves back on level terms, Arsenal took the time to warm up on the same theme as the strike of the first period. At that point, Carroll almost made it 2-1 but his header from a long diagonal ball wide with only Mannone beaten until delivery, while Nolan wasted a great chance when clean through.

Arsenal began to assert their authority on the game, Giroud Walcott latched onto a through ball is just 16 minutes after coming on to score his fourth goal of the season with a shot near the right goal. Another chance fell to Nolan, but he was fired from the edge of the box, and that loss proved costly once Cazorla broke out in the third Arsenal from 20 yards to cap an outstanding individual performance score 1-3 to Arsenal. Only concern is for Arsenal left-back Kieran Gibbs, who left the field in the second half with what Wenger described then as "thigh problem".