Leeds United boss Jesse Marsch says Stuart Dallas is facing six months out after surgery.
Dallas suffered a broken leg in defeat to Manchester City.
Marsch said, "He had a successful surgery. Long surgery. Five and a half hours.
"Believe the outcome was very positive and they say it will be a long recovery, but believe he will have a full recovery.
"We can safely say six months. Could be longer. Nobody wants to rush him."
Marsch also said he hopes striker Patrick Bamford, who hasn't played since 18 March, will return to training next week.