Porto president Pinta da Costa has cast doubt on keeping hold of Andre Villas-Boas. The Porto coach is being linked with the job at Chelsea.
Reports from Portugal say Chelsea have turned their attention to Villas-Boas, who has already served as a coach at Stamford Bridge.
Da Costa admits he cannot stand in his way: "Villas Boas has a contract and a clause of 15million.
"If someone deposits 15million into our account and he wants to go, we can not do anything because it is something that is contractually specified."
tribalfootball.com understands Da Costa was in London last week - when Blues owner Roman Abramovich was also in town.
