Stander sustained an ankle injury in his side’s quarter-final victory over Toulouse and missed subsequent Pro12 triumphs against Glasgow Warriors and Ulster.
The match comes too soon for fellow Lions pick Conor Murray, however. The scrum-half has been absent with a shoulder issue since March and Gatland suggested Murray could lose his place on the tour to New Zealand if he does not return before the end of the season.
— Munster Rugby (@Munsterrugby) April 21, 2017
Saracens’ starting XV features all six of their Lions representatives: Owen Farrell, Maro Itoje, Billy Vunipola, Mako Vunipola, Jamie George and George Kruis.
Leinster have suffered a blow ahead of their semi-final against Clermont, with O’Brien ruled out due to hamstring tightness. The Lions back-rower will be reassessed before next Friday’s Pro12 clash with Glasgow Warriors.
David Strettle replaces Noa Nakaitaci (ruptured anterior cruciate ligament) in the only change to Clermont’s quarter-final line-up, after Davit Zirakashvili, Benjamin Kayser and Sebastien Vahaamahina were all passed fit.
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