Chelsea are currently at the top of the Premier League table with 56 points, Arsenal are joint-second (together with Tottenham) with 46 while United are in sixth place with 41 points but one game in hand.
But Hazard, who spoke to Arsenal and France legend Thierry Henry for a Sky Sports TV program, did not seem very concerned about Spurs, Liverpool or Manchester City.
"I think Arsenal and Manchester United," the Belgian replied when Henry asked him which teams are still in the running for the crown.
"United had a bad first part of the season and I think for a couple of games now, they played well.
"They drew against Stoke, but they have good players and the squad is very good.
"The manager [Jose Mourinho] is good, so they will be second or third."
"Tottenham also are strong. We lost there, but for me it is more Manchester United.
"They are more experienced. That is my opinion, maybe I'm wrong," the Belgian international concluded.