The Uruguay international is currently on-loan to Zaragoza from Real Madrid, but will make his move permanent at the end of this season.
Diogo said: “It is a flattering that they’re paying attention to me, especially an organization like Barca.
“But I do not know much about these things. I only know that I am playing here, in an ambitious project that wants to continue growing. I would be delighted to stay here for many years.”