AC Milan sporting director Massimiliano Mirabelli admits a move to Spain is likely for Nikola Kalinic.
Kalinic, 30, scored only six goals in 31 Serie A appearances last season, following his move from Fiorentina.
Speaking to Sky Italia, Mirabelli said: "We have many top players and some of them have received a few offers. Kalinic is also wanted by many clubs, Atlético and Sevilla are the closest teams right now."
Kalinic has already had a turbulent close season, having been sent home from Croatia's World Cup squad after reportedly refusing to come off the bench in their opening victory against Nigeria.
In his absence, Croatia have reached the semi-finals.