Arsenal confirm new signing Timber has suffered ACL injury

The new arrival from Ajax has already undergone surgery on the knee injury

Arsenal's Jurrien Timber (centre) leaves the field of play after picking up an injury during the Premier League match at the Emirates Stadium, London. Picture: Adam Davy/PA Wire. 

New Arsenal signing Jurrien Timber faces a prolonged spell on the sidelines after the club confirmed he has undergone knee surgery on an ACL injury.

The Netherlands defender moved to the Emirates Stadium from Ajax this summer but was forced off on his Premier League debut - Saturday's 2-1 win over Nottingham Forest.