Influential midfielder Hassan Mostafa has joined Zamalek's injury list ahead of Thursday's league clash with Police Union. “Hassan received a knock in Tuesday's training, so he will not be available for the match,” Zamalek team doctor Mostafa Al-Monayeri told FilGoal.com. Mostafa has been a key figure in Zamalek's season so far, having been Hossam Hassan's first-choice selection for the defensive midfielder role. The former Ahli man joins Amr Zaki, Amr Al-Safti, Omar Gaber and Hazem Emam out of the crunch game with Police.