Real Madrid want to sign Chelsea forward Eden Hazard, according to Sky sources, but talks between the clubs have not taken place.
The Stamford Bridge side do not comment on what they regard as media speculation and rumour.
As such, they have declined to offer a response to a report in Spanish newspaper Marca on Tuesday morning claiming they would be willing to sell Hazard to Real.
The 26-year-old is in contention to win his second PFA Footballer of the Year in three seasons after an excellent campaign for the Premier League leaders.
Having struggled to find form last term, the Belgian international has played an integral part in Chelsea's rise to the summit, scoring 11 league goals so far.
Hazard signed a new five-and-a-half-year deal in February 2015, meaning he remains contracted to the club for another three full seasons.
Real president Florentino Perez has set his sights on signing a new Galactico - and wants to bring in the Chelsea forward. Head coach Zinedine Zidane has previously labelled the former Lille forward the third-best player in the world behind Barcelona's Lionel Messi and Cristiano Ronaldo.
Sky Sports' pundit Davie Provan, speaking on Premier League Daily, believes the Spanish side would be acquiring a player coming into his prime if they were able to force a move.
He said: "There is an attraction about Real Madrid that very few other clubs have.
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"If Hazard wanted to go to Real Madrid, I think Chelsea - even Chelsea - would be under enormous pressure to do some kind of deal.
"At 26 years of age, he's just about to come into the very best years of his career.
"Whoever gets him - and hopefully he'll stay with Chelsea - they'd be getting one of the world's top players, who is probably going to get better over the next two or three years."
It would be a breach of FIFA regulations for a club to approach a player without consent, but there is no suggestion that has happened in this case.