Lille stay third, in the Champions League qualifying round berth, on 50 points from 28 games. They are seven adrift of second-placed Montpellier with Paris Saint-Germain top of the table on 59 points.
In full view of Manchester City manager Roberto Mancini, who was sat in the crowd, Hazard delivered a brilliant performance and gave the hosts the lead on 18 minutes when he netted from close range after a fine collective move.
"The coach told me before the match," Hazard told French television Canal+ when asked about Mancini's presence.
"I try to be always the same on the pitch, to play my game and show what I am able to do," added the much-hyped Belgian, who was watched by Manchester United boss Sir Alex Ferguson last weekend.
Danze diverted in Emmanuel Riviere's soft shot on the stroke of half-time.
"Since the season began, we have been saying to ourselves that we have a great team. We are more mature, we have been playing together for five years. We grew up," Toulouse midfielder Moussa Sissoko told television channel Foot+.
