Leeds United captain Liam Cooper and Stuart Dallas both suffered injuries during Saturday’s win at Sheffield United and will likely be out until the New Year.
Cooper limped off after 20 minutes while Dallas completed the full 90 minutes without any signs of discomfort.
Leeds expect Cooper to be available in under six weeks while Dallas’ recovery period has been set at between four and six weeks.
“This is always a period of the season when players tend to pick up more injuries and we’re disappointed to lose Stuart and Liam who’ve performed well recently,” United’s head of medicine and performance Rob Price said.
“However, we have other players who are edging closer to contention and a squad of players who know exactly what Marcelo expects from them in every position.
“The medical staff will continue to work with all the players who are going through the rehabilitation process and we will have them back for what will be a critical stage of the campaign.”