Both team captain Rory Best and fellow front rower BJ Botha were forced to leave the pitch, during the second half, due to injuries.
South African prop Botha has sustained an elbow injury. He had it scanned earlier today.
Best sustained a rib injury in the closing stages of the 9-6 win and his treatment is ongoing. A decision on his availability for Saturday's game against Aironi will be made later this week.
Declan Fitzpatrick and Nigel Brady replaced their injured colleagues during the round 5 fixture, which marked Ulster's fourth win in five pool games this season.