Chelsea striker Diego Costa has not travelled to Leicester for Saturday's Premier League clash, Press Association Sport understands.
Costa has been prolific this season for a Chelsea side five points clear at the top of the table entering this weekend's fixtures.
The Blues declined to comment on reports that the 28-year-old had had a disagreement with head coach Antonio Conte and his coaching staff.
Conte on Friday afternoon said he had some undisclosed doubts for the game, but mentioned no names or reasons for potential absences.
Eden Hazard could play in a central striker role in Costa's absence, just as he did against Bournemouth, when the former Atletico Madrid striker was suspended.