Eden Hazard says Real Madrid are aware of what they need to do if they want to sign him from Chelsea.
The Belgium midfielder insists he is "focused on the World Cup" but wants clarity over whether or not Antonio Conte will be in charge at Chelsea before committing to the club on his return from Russia.
Conte has a year left on his contract at Stamford Bridge.
Hazard, 27, says he has "won everything in London, except the Champions League", and admitted he was disappointed in his own performance as Chelsea were knocked out by Barcelona at the last-16 stage last season.
Real Madrid, Champions League winners for the third time in a row, were interested in signing Hazard when Zinedine Zidane was in charge, according to Sky sources.
But the Spanish giants' ongoing interest is unclear now former Spain boss Julen Lopetegui has taken over at the Bernabeu.
"I wait to see whether the [Chelsea] coach will stay or leave," Hazard told L'Equipe. "If I stay it's for the club to be better than last season. I don't want to stay for us to be poorer.
"Real Madrid could interest me, the world knows that. But if tomorrow this club does not want me any longer then we will not speak about it any longer.
"If they want to buy me they know what they need to do. I don't want to go there just for the sake of it. There needs to be a project.
"There is still a project at Chelsea [two years left on his contract]. If I have a good World Cup, things will become easier."