Zamalek forward Mostafa Gaafar is set to undergo tests on Sunday to determine whether he could take part in his side's game against ENPPI on Tuesday. The 27-year-old sustained a nagging knee injury during the 1-0 defeat against Gaish in the Egyptian League on Friday. "Gaafar bruised his knee in the last game and had to be rested on Saturday," team doctor Mostafa Al-Muniri was quoted as saying by Zamalek's website. According to Al-Muniri, Gaafar is currently the only unfit player in the Whites squad. Zamalek, placed third in the league table, are to face ENPPI in a postponed game. Reiner Hollmann's men are keen to clinch a win over the petroleum side, who lead Zamalek with a sole point.