Besitkas midfielder Gary Medel is coy over his future beyond the end of this season.
The Chile international is a target for West Ham, where manager Manuel Pellegrini is a fan.
West Ham made an attempt for Medel last month and will try again in the summer.
And the former Cardiff City midfielder told FOX Sports: "I still do not talk about renewal, I still have a contract and one year to go.
"But I do not know what I want for the future: we'll talk about it later."