Hazard has been repeatedly linked with a move to Real Madrid, suggesting to be named the world’s best player he may have to play in Spain.
“He’s a fantastic player,” said Sarri, speaking ahead of Saturday’s Premier League clash with Jose Mourinho’s Manchester United.
“And so it will be very important for us if he will remain with us. Very, very important.
“I think also he can win everything, also the Ballon d’Or, here, without playing in Spain.
“Because, for example, if Chelsea were able to win the Champions League, Belgium won the European Championship, he would be able to win everything, without playing in Spain.”
