Exeter have suffered another setback after it was confirmed that second-row Damian Welch will miss several months with a chest injury.
The 33-year-old forward sustained a pectoral muscle injury against Clermont at Stade Marcel Michelin in the Champions Cup on December 20.
"We will know more of the details post-operation," said head coach Rob Baxter, whose side sit second in the Premiership table.
"Damian is looking like he is out long-term, which is unfortunate. It's more likely to be months rather than weeks."
His absence is another concern for the Chiefs, who in recent weeks have lost Henry Slade (broken leg), Luke Cowan-Dickie (broken thumb) and Dave Ewers (knee) to long-term injuries.