Oxford United midfielder Brian De Keersmaecker is likely to miss the rest of the season after undergoing surgery.
The 25-year-old has had a procedure on a shoulder injury, which has kept him out since the U's victory over Leicester City in January.
De Keersmaecker joined Oxford in the summer from Dutch side Heracles Almelo and has since gone on to make 28 appearances across all competitions this season, scoring two goals and registering five assists.
U's boss Matt Bloomfield confirmed the midfielder had undergone the operation on Wednesday.
"We'd been waiting for his return and he had been training," Bloomfield told BBC Radio Oxford after the loss at Stoke.
"But he's decided to have the operation on his shoulder and we wish him a speedy recovery, I'd be very surprised to see him on a pitch this season.
"The club invested heavily in Brian last summer and he was a big signing for the football club, we thought he could recover and play and it's really frustrating that he won't."
Oxford are 23rd in the Championship table and six points from the safety line.