Olivier Giroud netted his first Barclays Premier League goal as Arsenal came from behind to beat West Ham 3-1 at Upton Park.

The Gunners had seen their unbeaten start to the new season ended by a 2-1 home defeat against leaders Chelsea last weekend, but Arsene Wenger's men, who beat Olympiacos in the Champions League on Wednesday night, showed great character to recover from conceding an early goal to Mohamed Diame.

France striker Giroud, a £12million summer signing from Montpellier, netted from close range just ahead of half-time, with substitute Theo Walcott slotting home another on the break before industrious Spaniard Santi Cazorla struck a superb 25-yard effort.

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Theo Walcott
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