South Africa stars Schalk Burger and Conrad Jantjes have been ruled out of Stormers' pre-season friendly against Saracens.
The South African team face the Guinness Premiership side in a warm-up game on Sunday at Newlands.
World Cup winning flanker Burger is nursing an ankle knock though and will be replaced by youngster Francois Louw, while number 15 Jantjes has a groin strain.
Veteran full-back Percy Montgomery comes into the team in place of Jantjes meanwhile, having last played in a Stormers jersey in 1996.
And Stormers coach Rassie Erasmus is keen to see his side put in a good display ahead of the new Super 14 season, which starts in February.
"Saracens are a class team with some awesome international talent and a fantastic coach," Erasmus said.
"Playing a side well into their season and at the top of their game provides us with incredible match preparation for the rigours of this year's Super 14."