Fiorentina sent a legal letter warning Inter about their approach for Mohamed Salah, but the club still offers €20m to Chelsea.
This saga is increasingly tense and has broken into all-out war between the two Serie A sides.
The Egyptian wide man arrived on loan in January as part of the Juan Cuadrado deal and Fiorentina activated their option to extend for another year at a cost of €1m.
Salah claims he has the power of veto and is refusing to return for pre-season training on July 17.
Nonetheless, La Gazzetta dello Sport claims Inter have offered Chelsea €20m to buy Salah.
This puts the Premier League champions in an awkward position, as they don’t want to risk selling a player who is legally contracted to Fiorentina for 2015-16.
If Salah presses ahead with his refusal to attend Viola training, he could not only be sued for millions, but also be given a lengthy ban.