The player is suffering from a muscular injury and he will have a fitness test on Saturday to determine his availability for the match.
The two players does not have time to rest as they will join Al Ahly's delegation in the UAE as the champions of Africa are preparing to participate in the FIFA Club World Cup.
The duo has been called-up by their national teams to participate in the competition.
Uganda's unexpected draw in Kigali against Kenya sent Mali to the final round.
Mosimane decided to rest the team's starting midfielder after having a fantastic run with the team in the last couple of matches.
"It will be a tough clash and we are ready to fight for the victory." Dieng said on Friday.