The Blues were defeated by fellow Blues Leicester City 2 – 1 thanks to goals from Jamie Vardy and Riyad Mahrez.
Hazard was substituted with an injury after he was tackled by Vardy. The Belgian appeared to be suffering from an hip injury after falling on his wrong side.
Despite the injuries and the poor form of his team, Mourinho insists he will not be signing anyone in the January transfer window.
He told Chelsea’s official website: “I don’t think it is right I go to the board and say these players are not good and we need to spend 50 or 100 or whatever.
“We have these players and it is with these players we have to go, and the players that are not performing well must feel attacked in their pride, in their self-esteem and they have to do everything to get results in a humble way.”
The defeat leaves the Blues just one point above the relegation zone in what has been an uneventful season for the club. Chelsea travel to Sunderland in their next Premier League fixture.