Chesterfield striker Jack Lester could be out for three months after suffering a suspected broken arm against Leyton Orient.
Lester was injured in the 82nd minute when he collided with Orient keeper Lee Butcher and referee Gary Sutton angered the home camp by awarding a free-kick against the frontman.
Chesterfield manager John Sheridan was clearly annoyed with the decision and said: "I do not see how he has come up with that.
"The keeper had come right over the top of him and the defender so I don't see how he has given the free-kick against Jack but he obviously sees the game differently to me.
"Jack will be a big loss for us, he's a big player especially at home.
"It's a real shame, he's worked very hard this season but he's a strong character and I'm sure he'll come back as strong as ever - but it's a blow."