Burnley striker Martin Paterson could face a lengthy spell on the sidelines after damaging knee cartilage against Barnsley on Tuesday.
The 22-year-old was stretchered off during the Clarets' Carling Cup defeat at Oakwell after twisting his knee in the 15th minute.
Subsequent checks revealed that the damage requires surgery, meaning a quick return is likely to be out of the question for the Northern Ireland front-man.
However, there is more positive news for goalkeeper Brian Jensen, who does not look to have suffered any lasting effects from his own injury on Tuesday.
Jensen was also forced off the pitch against Barnsley after a collision with opposing defender Darren Moore.
Despite being relieved to see his keeper avoid serious injury, Burnley boss Owen Coyle could not hide his disappointment over Paterson's injury woe.
"We have mixed news on the two lads," the Scottish manager told the club's official website.
"As we thought Brian suffered a dead leg and I am hopeful he could be fit for the weekend.
"But the news on Martin Paterson is a little worse. He has tweaked a cartilage and will undergo an operation tonight (Wednesday), at which point we will know further how long he will be sidelined for."