Juventus have reportedly bid €16m for Fernando Llorente, but face competition from Barcelona, Tottenham and Manchester City.
The Spanish international striker told Athletic Bilbao this week that he does not want to renew his contract, which expires in June 2013.
Juve have confirmed their interest in the hitman and reportedly made an offer of €16m, but it is considered too low for Athletic.
According to Catalan newspaper Sport, Barcelona are diving in with their own proposal, although they would prefer to wait until he is a free agent next summer.
Tottenham are more likely rivals for his signature, as it is rumoured they have bid €25m for Llorente.
Manchester City can also wait in the wings as a bidding war breaks out in Bilbao.