Kompany is hoping to return to the heart of their defence at Stamford Bridge on Sunday after being out for three weeks with his second groin strain of the season.
"He is a great defender," said the 22-year-old Hazard. "He is really important for them. When he plays they win - and when he doesn't they lose, often. That proves his importance.
"We know his quality. We are lucky to have him in the Belgium team. I prefer to play with players like that than against players like that."
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