Barcelona coach Xavi cannot rule out Frenkie de Jong being sold.
The midfielder is a target for Chelsea and Manchester United.
De Jong scored the final goal in Sunday's 6-0 victory over Pumas in the Joan Gamper Trophy.
Asked about the Dutchman, Xav said: "Frenkie already knows my position and that of the club, for me he is a great player. I don't know what will happen to Frenkie de Jong.
"Until August 31, anything can happen… "
