Hull City midfielder Liam Millar will miss the rest of the season after scans showed he has suffered an anterior cruciate ligament (ACL) injury.
The Canada international was forced off after just 13 minutes of the Tigers' 1-1 draw with Burnley on Wednesday.
Hull boss Tim Walter revealed after Saturday's 1-1 draw at Derby County that the 25-year-old had been in tears after his diagnosis.
Millar had become a key part of Walter's side, making 12 appearances in all competitions, after his summer move from Swiss side Basel.