The striker was forced off after 30 minutes of Friday's 5-1 hammering at leaders Newcastle nursing a dead leg and will receive more treatment on Monday before undergoing a fitness test on Tuesday.
Should he not make it then it will be another blow to an injury-hit Bluebirds squad already missing captain Mark Hudson (ankle) and influential midfielders Gavin Rae (hamstring) and Joe Ledley (hips).
Hudson will have an operation to repair his ruptured tendon on Tuesday, Rae is looking at another two weeks on the sidelines while Ledley will have the second of his two hip operations next week. Forwards Josh Magennis (broken fibula) and Kelvin Etuhu (ankle) also remain out.
After spending three months out, Stephen McPhail's return was one of the only bright moments on Tyneside and he will again be hoping for involvement, but whether he can handle two starts in the space of five days is a different matter.
