The Argentina international, who almost joined Valencia last summer, said: "The Portuguese League does not have as much importance as the Spanish or the Italian, for example. Hopefully I can make a change. Although it is not hopeless for me to stay here because I am very well.
"At Atleti, it may depend on whether Maxi Rodriguez stays or not, I believe that Liverpool is interested. And in addition, coach Javier Aguirre is not confirmed for the next season.
"Nobody yet has contacted me, everything I know is from the newspapers and Internet."