The Gunners midfielder was forced off in the second half of Saturday’s 2-1 defeat by Manchester United at Emirates Stadium after a heavy tackle from Paddy McNair left him with suspected ligament damage.
Wenger confirmed that there was no bone damage and is hopeful that Wilshere will not require surgery, with the midfielder set to see a specialist next week.
However, the Frenchman could not hide his disappointment following the 22-year-old’s latest in a long line of injury setbacks.
“It’s so sad, because he just came back and you see in the big games he has a personality,” said Wenger.
“It’s more than just about his game – he shows you that he’s not scared to play and that he’s ready to want the ball always.
“When he loses the ball he’s ready to put his body in. It’s part of his game – you cannot get that out because he would not be Jack Wilshere any more.”
He added: “There is no bone damage, we knew that straight away after the game. It’s ligament damage. The extent of how bad it is we will know Tuesday or Wednesday [next week]. It’s the other ankle [from the one he had problems with in the past], his good ankle.
“He struggled for a while with his right ankle. He lost a bit of mobility because when you go two or three times in the same ankle. But he found his mobility back.
“I hope it will not be surgery, just a boot for a few weeks.”
Wenger stopped short of criticising United youngster McNair for the hefty challenge in the second half of the defeat.
He continued: “It doesn’t look good but I think the tackle forced him from the side. I watched it again, he moved the ball forward a bit too much and then when he dived to make the pass, McNair came in and took him from the back and the side.
“When you see the pictures, it [the injury] looks very bad. I don’t think it was a tackle with the desire to hurt. I think he really went for the ball, but it was a late tackle, one a young player can do. It was a bad foul.”
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