Aaron Ramsay limps off with thigh strain as Theo Walcott scores twice in big Arsenal win Theo Walcott celebrates the first of his double at Upton Park. Theo Walcott scored twice and Lukas Podolski the other as Arsenal came from behind to score three second-half goals and win at West Ham United. But the 3-1 success - and return to the top of the EPL table - was marred by an injury to influential midfielder Aaron Ramsey who will miss the rest of the Christmas schedule after suffering a thigh injury. Ramsey has been a key figure in Arsenal's challenge for the Premier League title and the Wales international's injury is a major blow to the Gunners' hopes. He limped off in the 65th minute at Upton Park to ruin his 23rd birthday. Arsenal now face league matches against Newcastle United and Cardiff City and then an FA Cup tie with north London rivals Tottenham Hotspur. "It looks like a thigh strain," Gunners manager Arsene Wenger said. For me, I don't know how serious the thigh strain is but the Christmas period is certainly over for him. It was his birthday today. I don't know how long it will be. We will have to see tomorrow morning. He knew straight away, but we have to see. Walcott struck twice in three minutes to turn the game around after Carlton Cole had given Arsenal the lead, squeezing a low shot past West Ham goalkeeper Adrian in the 68th minute and then heading home a cross from substitute Podolski. Podolski was making his first appearance since August after a hamstring injury and he marked his comeback with a goal in the 79th minute, drilling home from Olivier Giroud's lay-off. "We couldn't take our chances in the first half and we responded very well in the second half, in the end winning the game in a convincing way," said Wenger. Victory sent Arsenal three points above former leaders Liverpool while West Ham slump to second-bottom.