It is believed the 31-year-old Australian, who has been in wonderful form with 14 goals for Galatasaray this campaign, has re-injured a pre-existing adductor problem and now faces two months on the sidelines.

Kewell suffered the blow in Galatasaray's recent 3-0 Kupasi win over Orduspor, which saw the Socceroo replaced at half-time.

Galatasaray reported on their official website that Kewell had this week been receiving treatment for the injury which is believed to be a second-degree tear of the adductor tendon.

The news is a major blow for Kewell who seemed to be in peak condition at Galatasaray this season resulting in a return to some of his career best form.