Exeter centre Henry Slade looks set for a spell on the treatment table after he suffered a suspected broken leg against Wasps on Saturday.
The England international was stretchered off at the Ricoh Arena in the Chiefs' 41-27 bonus-point win after sustaining an injury at a ruck.
And according to boss Rob Baxter it doesn't look good for the talented back, who seems certain to miss the 2016 Six Nations Championship.
"Henry has an injury to the lower part of his right leg and it is envisaged he will operated on sometime today (Sunday). At the moment we have set no timescale on how long he will be sidelined for. A more detailed assessment will be made following the operation," he said.
Baxter added on their win: "The performance was very good, you know I'll be honest, credit to Wasps, I was surprised how well they fought back into it.
"Because I think the truth is, and I've seen it before with our lads, Wasps have had some big emotional performances in the last few weeks and they are draining and they do take it out of you and sometimes it's hard to hit the field with that same intensity.
"Our challenge was to get out on the pitch and try and put a bit of pressure on Wasps with our line speed and defensively put pressure on their scoreboard and see if they had been drained by those two previous games."