However, Perez talked up the contribution Bale has made at the club since his world-record move from Tottenham Hotspur and hopes that the two parties can continue to enjoy more success in the future.
"He was four months out injured but he has given us many things in the three seasons," he told reporters.
"People say that I have preferred players, but I've brought them all with the same affection. Including Marcelo, who I didn't sign. We hope that Bale gives us lots of satisfaction."
Bale has scored 67 goals in 150 appearances for Madrid since his 2013 arrival.