Hazard knows there are other players to be wary of but feels Messi is by far their biggest threat and says Belgium will work on a plan to try and combat the Barcelona forward.
"We know the best player in the world is in this team, but we are not afraid," Hazard said.
"We can win. Argentina have done well, but they have one big player who can make the difference every game. If we can stop him, we have a chance, but it will not be easy.
"For me, he is the best in the world. I don't know how we can stop him, but we will watch videos and we will try to win.
"They have Angel di Maria as well, but Messi is the difference.
"I haven't played against him before and I will think about it the night before.
"But once I am on the pitch, I don't care who I play against. I do what I do, but I try to do my best."
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