"Abou-Treika will undergo intensive scans and a full check-up as it is not the first time he falls unconscious," Ahli's marketing manager Adli Al-Qaeyi told FilGoal.com.

The International playmaker collapsed last season in a league game against Ismaili.

Abou-Treika joined his teammates in their pre-season training camp at Schalke as he has just started rehabilitation from a knee injury.