With Real Madrid circling around Hazard, it seems likely he will move this summer for a deal in excess of 100 million.
However, Cascarino believes it will be a tough loss, as Hazard is the club's talisman at the moment.
"He [Hazard] is up there with the very best. If he gets you from a standing start and he stops, you're in trouble. There aren't many players I can say that about.
"He goes from zero to 50 in a split second, then he's gone. He'll go either way. How many players can go either way?
"You know he's going to beat you. Take the first goal last night, there's not much that any defender could do about that. The speed, acceleration, ability – if you go near him, you know it's going to be a penalty.
"He is just a very talented boy.
"I do think he'll leave this summer, it's a consequence of his contract running down. [Zinedine] Zidane was his hero, so he will want to taste pastures new."