Hazard was sent off late in the game after an incident involving one of the ball boys who later was invited by Chelsea into the changing room to speak to Hazard.
Hazard told Chelsea TV: "The boy put his whole body onto the ball and I was just trying to kick the ball and I think I kicked the ball and not the boy. I apologise.
"The ball boy came in the changing room and we had a quick chat and I apologised and the boy apologised as well, and it is over. Sorry."