Zamalek midfielder Ahmed Hassan said on Wednesday his side would face a more difficult task than Ahly when both sides lock horns in Sunday's African Champions League clash at Cairo's Military Academy Stadium. The White Knights kicked off their group stage campaign with a 3-2 loss at Ghana's Berekum Chelsea while Ahly defeated TP Mazembe of DR Congo 2-1 in Cairo. "Definitely, it’s going to be a very tough game for both teams as it’s always difficult game between these sides," Ahmed Hassan, who enjoyed a successful three-year spell with Ahly before joining Cairo foes Zamalek in the summer of 2011, told CAF's official website. "I believe Zamalek’s mission is harder after we lost our Day 1 encounter against Ghana’s Berekum Chelsea. We need to win to keep our chances alive for a semi final spot. On the other side, Ahly is also looking for victory to raise their points tally so this makes the game a very difficult one for both sides." The match will be played behind closed doors due to lingering security concerns in Egypt. ahramonline .