Arsenal signing Kieran Tierney faces six weeks on the sidelines.

Former Celtic fullback Tierney could have to wait six weeks to make his Arsenal debut after the club confirmed he is continuing to receive treatment for a groin injury.

The Scottish left-back joined the Gunners from Celtic for £25m on Deadline Day but his new side say he will not be able to take part in full training for between four and six weeks.

Tierney struggled with injury towards the end of last season and featured just three times for the Hoops in their final nine matches of last season.