Fiorentina coach Vincenzo Montella concedes Juan Cuadrado could leave for Chelsea.
Cuadrado's contract carries a 35m buyout clause.
"The issue around Cuadrado is very simple: he has a buy-out clause, which was written into his contract along with the club," said Montella.
"If a team comes along and pays it, and the player wants to leave, then he can go. This clause expires during the last few days of the transfer window, but as far as we are concerned the player is not for sale."
