The Gunners have yet to decide whether the club will pursue compensation from the FA as the injury occurred whilst the 19 year old was on international duty.
"I'm disappointed because he is an important part of the squad, but that could have happened in training here," Wenger said.
"It was an accident that could have happened anywhere.
"I do not blame the FA for that. It was accidental in training and I accept that.
"In a moment like that you do not think about compensation you think about how you can replace the player."