Leeds boss Marcelo Bielsa has revealed captain Liam Cooper and Kalvin Phillips are not expected to return from their respective hamstring injuries until March.
The duo sustained the problems during the 2-2 draw with Brentford at the start of December, and while they were not set to feature again until the new year, the update is a blow for the 16th-placed team in the Premier League.
Speaking ahead of Sunday's visit of Burnley, Bielsa was asked if the recent fitness issues in the squad, which had seen the club's last two matches postponed, would force Leeds to be active in the January transfer window.