The Stamford Bridge boss believes the winger has improved greatly since he returned to the club.
And as well as intimating that the club have opened talks with him on a new deal, Mourinho feels Hazard can be one of the best players of his generation.
Mourinho also warned against the threat of their German opponents, who they face at home tomorrow night.
Schalke come into the clash off the back of a 4-1 defeat to Borussia Monchengladbach at the weekend.
But the Portuguese side reckon they will be stronger because of the loss – and Chelsea must be ready for the challenge:
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