Cork spokesman Pat Horgan has confirmed the injury sustained by half-back Sean Og O'hAilpin is not too serious.
"We’re hoping he’ll be back in action shortly," he said. "He’s out for Sunday’s game. That’s about as much as we know for certain at the moment.
"But we do want to say that, thankfully, his injury was not too serious and we’ll have him back to full fitness shortly."
The Na Piarsaigh clubman was taken to the University Hospital in Cork where he will be examined by medical staff.
The exact extent of his injuries has not yet been revealed, but it is believed the player suffered a chipped bone in his knee.
The news comes as a major blow to Cork boss, Tom Cashman, whose half-back line was already seriously weakened by the loss of Brian Corcoran, who will be out for at least two more weeks with a broken finger.
Corcoran is named on the bench, but is unlikely to play any part.
Should Cork win on Sunday, it is doubtful O’hAilpin will recover in time for the resulting semi-final clash with Waterford on June 10.
Football manager Larry Tompkins will also be keeping a close eye on O’hAilpin’s progress ahead of the Munster Championship clash with Clare on June 24.