Reports in Italy claim that Modric has been talking to Inter over a surprise move, with the 32-year-old hopeful that Madrid will let him out of the last two years of his current contract.
Real are unsurprisingly not considering letting him go following the departure of Cristiano Ronaldo - but Modric may force their hand.
"The only possibility that Modric leaves is by paying 750m euros (£668m)", Perez was quoted as saying in Marca.
No Interest In Willian From Real Madrid
Brazilian global Willian has failed to return to Chelsea for pre-season with rumours of a move to Real Madrid continuing to swirl. The Brazil global , 29, has been heavily linked with a move away from Chelsea this summer.
It's reported that the Serbian playmaker, who also featured for his country at the World Cup, has been on Real Madrid's radar for some time, and could be lined up as an heir to Modric's crucial role within the Madrid side, while becoming Julen Lopetegui's first marquee signing as Madrid boss.
The midfielder reportedly wants to leave Real Madrid after six years at the Bernabeu.
While reports said the Serie A side had agreed a deal with Bayern Munich's Arturo Vidal, Goal understands the Chilean midfielder is close to joining Real Madrid's La Liga rivals Barcelona. Madrid's number 10 has marked himself in recent years as one of the greatest midfielders to ever play the game, with Croatia's recent run to the World Cup final only emphasizing that point. Manchester United's Matteo Darmian is the player that Inter now have in mind but they may have to act fast to secure him with Napoli also lurking.