In a group that includes Wales and Scotland, Serbia are currently level on four points with Belgium, and after he watched a video of Serbia's 6-1 victory over Wales last month, Hazard has admitted that his side face a tough match.
Hazard said: "I have never known a better Serbia.
"This team have a lot of quality players. We saw the video and we will have to be careful."
Hazard, who left Lille to join Chelsea during the summer, has scored two goals in 31 games for Belgium.