The Egypt playmaker had a scan on Tuesday and an interstitial tear in the medial collateral knee ligament was confirmed.

The news come despite the fact that Ahli played down the injury initially, suggesting that the problem 'is not serious'.

Abou-Treika picked up the injury during the Reds' 1-0 win at Ghazl Mahalla last weekend, when he entered the game as a half-time substitute.

The 29-year-old will definitely miss the league game against Harras Al-Hodoud on Thursday.