Bath back-row Taulupe Faletau is an injury concern for his side after he left the field during Saturday's win over Northampton.
The Wales international's Premiership debut at Franklin's Gardens ended after 12 minutes when he was replaced by Tom Ellis.
Faletau might have damaged knee ligaments and it is still unclear how long he will be out for.
Bath coach Todd Blackadder said the loss of the number eight showed the depth of his squad.
"It sounds like a little bit of a medial, so we'll just wait and see," he told the BBC.
"It's about the strength in depth of your whole squad and we showed that."