Arsenal midfielder Jack Wilshere has been ruled out for several weeks due to a hairline crack to his left fibula he suffered while training for the community shield game with Chelsea.

Manager of the club,  Arsene Wenger affirmed that the 23-year would be out for several weeks in a statement on the club’s website.

“The information you have heard about Jack Wilshere is right,” Wenger told Arsenal’s official website. “I had a bad surprise because it is a hairline crack in his fibula that makes him a few weeks out. “There is minimal damage apart from the bone damage — there is no damage at all apart from that. It was a collision in training and it was all completely accidental.”

The midfielder missed a large part of last season after suffering ankle ligament damage and then undergoing minor surgery to remove some studs on the pins in the bone. Wilshere, who made 14 Premier League appearances in 2014-15, is now set to miss the beginning to the Gunners’ season, which starts on Sunday at home to West Ham.

He could also be absent for England’s forthcoming Euro 2016 qualifiers against San Marino and Switzerland on Sept. 5 and Sept. 8 respectively.