Arsenal’s new signing, Jurrien Timber, is set to undergo surgery to treat the ACL on his right knee.

Timber left Ajax for Arsenal in June and is now set for a lengthy spell on the sidelines.

No time frame has been put on his absence, but it could be up to seven to nine months.

The Gunners confirmed the situation in a statement, saying, “Further to detailed assessments with consultant specialists since Saturday, we can confirm that Jurrien Timber has sustained an injury to his anterior cruciate ligament in his right knee.

“Jurrien will undergo surgery in the coming days and will be out of action for a period of time.”