Nicolas Pepe, 23, has started the French season with four goals and three assists in only in five Ligue 1 appearances.
"The release clauses are not there to be paid," Perez said. "If there has to be sale, it's negotiated.
Real Madrid needed a way to replace the departed Cristiano Ronaldo's goals. Mariano Diaz looks the part, and that should worry Karim Benzema.
Vinicius, 18, has not been called into the first team squad for a game since he moved to Spain in the close season.
Fitter, happier and more productive: we're seeing a new Gareth Bale at Real Madrid this season. Sid Lowe explores the reasons why.
La Liga's plan to move the Girona-Barcelona game scheduled for January to the United States has taken a setback with the RFEF leaning against it.
Sergio Busquets' current deal, signed just two years ago, runs until 2021 and includes a clause which would see it automatically renew until 2023.
La Masia has produced a number of the world's best players during the last 20 years, including Lionel Messi, Xavi and Andres Iniesta.
Real Betis' home league game against Athletic Bilbao on Sunday evening will be postponed, but Valencia and Levante were forced to play in high heat.
La Liga's players remain unconvinced that plans for an overseas game are in their best interest, the president of the players' union said.
La Liga president Javier Tebas fears Major League Soccer may view plans to stage a regular-season game in the United States as a threat.
Mariano Diaz said he was honoured to be handed the No. 7 shirt and hopes he will continue to play well enough to play for Spain.
La Liga president Javier Tebas has hit back at FIFA president Gianni Infantino in the row over the proposed match between Barcelona and Girona.
Atletico Madrid's UCL campaign started poorly but battling performances from Diego Costa and Jose Gimenez keyed a quick turnaround to beat Monaco.
A year ago, Valencia looked like dark-horse title contenders. This season, they've yet to win a game and on Wednesday they play host to Juventus.
Antoine Griezmann has made winning the Champions League is his main objective for the season but said Atletico Madrid have not written off La Liga.
Barcelona president Josep Maria Bartomeu has said La Liga is worse off following the departures of Cristiano Ronaldo and Neymar.
Barcelona are fresh off a double-winning season but for players and fans alike, winning the Champions League is the only thing that matters.