Tau, a former Sundowns attacker, has enjoyed a solid Caf Champions League campaign, scoring two goals in three appearances.
He will be hoping that his trip back home to South Africa can help him rediscover his place in the starting eleven.
The match against Pirates could offer him a chance to impress both his coach and potential suitors.
Despite his struggles at Al Ahly, Tau's history in continental competition makes him a player to watch.
The game could be an important moment for him to reaffirm his quality and earn more playing time moving forward.