Arsenal midfielder Granit Xhaka faces up to eight weeks out of action due to a knee injury.
The Swiss international came off during the North London derby against Tottenham on Sunday, a game Arsenal won 3-1.
According to Swiss newspaper Blick, the player has ruptured inner ligaments in his knee.
He has, however, avoided an ACL injury, which would have kept him out for the best part of a year.
Xhaka currently has a brace on his leg, but could be back within two months for the Gunners.