The midfielder was caught by a falling Lucas Moura following a Thomas Partey tackle and had to be assisted to reach the sideline
Mikel Arteta admitted he's "pretty worried" about a potential layoff for Granit Xhaka after he was forced from the field during Arsenal's 3-1 derby win over Tottenham.
The midfielder was caught by a falling Lucas Moura following a Thomas Partey tackle and had to be assisted off the field by medics after a lengthy treatment on the pitch.
It took the shine off one of the most impressive results of his coach's era at the Emirates Stadium - and now the Gunners boss fears that a lengthy spell out could be in store.