Sunderland boss Gus Poyet admits Emanuele Giaccherini is out for the season.
Injury-plagued Giaccherini saw a specialist this week and Black Cats boss Poyet confirmed to day that the results mean he is unlikely to feature again in this campaign.
Poyet told safc.com: "Emanuele is going to be out for a while.
"It is incredible that he had a big injury after the Burnley game and it took him a while to come back, and then when you think everything is good he had another knock in the same area on the same bone and now it is going to take a little bit longer.
"He is practically going to be out right until the end of the season which is unfortunate for us, but we wish him well and I want to say a full recovery - not a quick one - so that we can count on him next year."