Stoke City will be without striker Bojan Krkic for the rest of the season after he suffered an anterior cruciate ligament injury during Monday's FA Cup fourth-round tie at Rochdale.
The Spaniard, 24, was hurt chasing down the ball during his side's 4-1 victory, and left the ground on crutches.
A scan on Tuesday confirmed the ligament damage in his left knee.
"It's bitterly disappointing for the club but even more so for Bojan," said Potters manager Mark Hughes.
"He was making such a big impact on the Premier League and clearly enjoying his football."
The former Barcelona player, who joined the Potters on a four-year deal in July 2014, opened the scoring at Spotland with his fifth goal of the season.