The England skipper picked up a knee problem during Chelsea's 4-0 win over Portsmouth in the FA Cup third round at the weekend.
"I have been struggling with the other knee but I clattered into the post with my right knee," Terry told Chelsea TV. "All is fine. It's a little bit swollen but I am sure with the couple of days off we have, it will heal."
Andre Villas-Boas's side sit in fourth place, 11 points adrift of league leaders Manchester City.