Sunderland manager Steve Bruce has revealed striker Fraizer Campbell is unlikely to play again this season as he prepares to undergo a second operation on his knee.
The 23-year-old underwent surgery after damaging his cruciate ligaments against Manchester City in August, and was preparing to make his return against the same opponents earlier this month when he suffered a setback in training. It was hoped that rest would solve the new problem, which came after he twisted the knee.
However, he will now have an exploratory operation which is likely to end his season, and Bruce said: "Fraizer is likely to have to go back and see the specialist who operated on him previously. He will open the knee up and have a look to see how things are."
Former Manchester United striker Campbell has managed just four appearances this season and his absence has proved particularly costly since Darren Bent's £24million move to Aston Villa in January.
Meanwhile, Bruce fears goalkeeper Craig Gordon will also need knee surgery.
The 28-year-old has been an unused substitute for the last five Barclays Premier League games after returning early from Scotland duty because of the injury.
Swedish specialist Professor Hakan Alfredson prescribed an exercise programme to help strengthen the ligaments, and Gordon will fly to Scandinavia once again next week to see if that has done the trick.
However, given the fitness concerns which have severely depleted his squad this season, Bruce is pessimistic about the outcome.
He told the club's official website, www.safc.com: "Craig sees the specialist next week. He has been following an exercise programme, so we will see what he has to say.
"Given the way the season's going, I wouldn't be surprised to see Craig having an operation too, to be honest. We will have to wait and see."
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