Peterborough winger Arron Davies is set to be out for up three weeks after picking up a hamstring injury.
Former Nottingham Forest man Davies sustained the injury in the weekend's defeat at Tranmere and is waiting to hear the full diagnosis.
He said: "I am very frustrated.
"I had to come off very early in the game and it is just a case of waiting for the full news but hopefully it will be good news.
"I had a sharp pain like an electric shock in the back of my leg and had to go off.
"I couldn't walk on it on Saturday night but it is feeling better already so we will see."