Arsene Wenger has revealed Theo Walcott is unlikely to play for Arsenal again this season following a hamstring injury picked up in Saturday's 0-0 draw with Chelsea.

Walcott had to be substituted after an hour at Emirates Stadium, clearly feeling his hamstring as he required medical attention. The winger attempted to continue, but had to be withdrawn for Gervinho.

Having become a fixture of the England side, news of Walcott's injury will be a worry for his country's chances at Euro 2012, having already lost one significant name in Jack Wilshere earlier this week.

''It looks like a serious hamstring," Wenger said. "First we assessed the hamstring, he wanted to go on and stay on the pitch, and I think he should have gone off straight away because the second time it was a real hamstring [injury].

''I think now for him it will be tough to come back before the end of the season. It is usually 21 days [minimum]. He should be OK to play for England, but I don't think he will be ready to play for us.''

Arsenal's draw leaves them facing the prospect of going into their final three games of the season with only a three-point buffer to fifth place, if Newcastle and Tottenham both win on Saturday. Both sides also have a game in hand on the Gunners.