The 66-year-old los Blancos chief insists the club will only look to bring in signings who can contribute to coach Carlo Ancelotti's vision of "spectacular football"
Los Blancos have thus far completed the signings of Isco, Dani Carvajal and Casemiro, and have been continually linked with the likes of Luis Suarez and Asier Illarramendi.
Perez, speaking at the official presentation of £26 million-man Isco, insists the club will only pursue further signings if they can contribute to new coach Carlo's Ancelotti's vision of "spectacular" football.
"As our coach says, Real Madrid has a duty to play spectacular football and we want new players who are up to the club's demands and have an insatiable hunger," he told reporters.
Madrid also confirmed on Tuesday that defender Nacho has penned a new deal with the club.
The 23-year-old, who made four appearances for the senior side last season, has signed a four-year extension to his current contract.