Hazard played with the Liverpool and former Blues midfielder at Lille.
He told Chelsea magazine: "Joe more or less told me the same things as Romelu (Lukaku). He told me what a great club it is and he was very keen on me coming here. Don't get me wrong, I'm not saying I only came here because Joe told me I should, but it was good to hear what he had to say.
"I'm really pleased to be here, I think he will be as well. I met him for the first time last season, he is a great guy and I'm sure we will talk about it the next time we meet!"