The agent of Porto fullback Alvaro Pereira says they'll consider offers at the end of the season.
The Uruguay international remains a target for Chelsea and is understood to still be disappointed that Porto blocked a move to London last summer.
Alejandro Savich said: "Rather than talk about the future, I think we must talk about today. Porto still has two games to play.
"After that, we'll look at any proposal that will arise for Alvaro. It has to be an offer that appeals to the club and the player also.
"The reality is that there are always clubs asking for the situation of Alvaro. This is true."