Valencia president Amadeo Salvo has admitted that he will look to increase the release clauses of a number of the club's key players.
Los Che have made a brilliant start to the La Liga season, with 23 points from 10 games leaving them second in the table.
Spain international Paco Alcacer has been key to their success this term, but it is understood that the youngster has a release clause in the region of £24m, which has attracted interested clubs.
"Paco should be at the highest possible. Players like Alvaro Negredo, Rodrigo Moreno, Andre Gomes, Dani Parejo, Nicolas Otamendi, Diego Alves, Sofiane Feghouli or Shkodran Mustafi can't have €20m or €30m clauses," Salvo told Super Deporte.
Valencia were 3-1 winners over Villarreal on Sunday afternoon.
