Real Madrid are weighing up a bid for Juventus defender Leonardo Bonucci.
Real are exploring the market for a new centre-half as they face up to selling Sergio Ramos this summer.
Tuttosport says Juve are aware of Real's interest and are pushing Bonucci to commit to a new deal through to 2019.
Real hold a couple of trump cards in negotiations - they could wave their buy-back option in Alvaro Morata's deal and also include Isco in their bid.
Juve coach Massimiliano Allegri has admitted his admiration for Isco in recent days.