Manchester City captain Vincent Kompany has emerged as a possible injury doubt for his side's Premier League clash at Chelsea on Sunday.
The defender received treatment on his knee during Wednesday's 1-1 draw with Real Madrid in the Champions League.
Reports have since suggested that the Belgian was forced to leave the Etihad Stadium on crutches.
Wednesday's draw with Madrid saw City eliminated from the group stage of the Champions League for the second season in a row.