The former Lille man won the PFA Player of the Year award last season but the Blues manager has hinted that the Belgian needs to return to his previous level.
Jose Mourinho has suggested that Eden Hazard must improve his performance level after Chelsea slipped to a shock 2-1 loss to Crystal Palace at Stamford Bridge on Saturday.
Goals from Bakary Sako and Joel Ward gave the Eagles all three points on Mourinho’s 100th home game in charge of the club – with Alan Pardew’s men inflicting only the second defeat at Stamford Bridge of the Portuguese’s Blues reign.