Zamalek are set to stage ‘secret' friendly games as they gear up for their Champions League clash against Ivorian side Africa Sport, according to assistant manager Ismail Youssef. The Cairo giants, who had their proposed Alexandria camp called off, intend not to unveil their opponents' identity nor the timing of their upcoming warm-up matches to have them successfully arranged. “We decided to prepare for the Africa Sport game by staging secret friendlies without revealing any details before the games,” Youssef told FilGoal.com. “Security are refusing to allow us play any games while announcing the timing and the venue, so we will have to change our tactics. “Even our players will not know the date of these matches as we will disclose details after playing them.” The Whites had two proposed friendlies with MCDR and Police Union cancelled of late as security fear any crowd gatherings following the Port-Said deadly incidents early in February. Zamalek clash with Africa Sport in the round of 32 first-leg tie on 25 March as the return game takes place in Abidjan a fortnight later.