Exeter Chiefs and England centre Henry Slade is set for a spell on the sidelines with ankle injuries that are still being assessed by club staff.
The 26-year-old was forced off during Saturday's win at Leicester after taking knocks to both of his ankles.
"Sladey's going to be out for a little while," Exeter director of rugby Rob Baxter told the club website.
"It is, however, not something he will be able to get over in a week or two - it's more significant than that."
Slade, who featured five times for England at this year's Rugby World Cup in Japan as Eddie Jones' side finished runners-up, was replaced in the first half of Exeter's 31-22 victory at Welford Road, which took the Chiefs top of the Premiership.
"He tried hobbling along with one [injury], until he picked up the second," Baxter added.
"The second injury is more of a concern as it's around an old injury, which he had previously had plated."