The 23-year-old suffered minor ankle ligament damage in the 4-1 defeat at Crystal Palace at the weekend and is likely to be out of action for at least two weeks.
Defender Stuart Parnaby tore a hamstring in the same game and is facing up to six weeks on the sidelines, while midfielder Kieron Dyer, who sat out the 0-0 draw at Burnley on Tuesday evening, has a tight hamstring.
He will be assessed ahead of the Lions' visit to the Riverside Stadium, as will defenders Jonathan Woodgate (calf) and Seb Hines (knee), midfielder Andy Halliday and striker Ishmael Miller (both ankle).
Fellow frontman Scott McDonald is hoping to return after his back problem settled down, but full-back Justin Hoyte (hip) and midfielder Julio Arca (toe surgery) are still out.
- Sports & Recreation
- Stuart Parnaby