Fiorentina president Andrea Della Valle has taken fresh aim at Mohamed Salah.
The former Viola winger joined Roma last week on-loan from Chelsea.
ADV said: “Roma could've done without taking this action. Now the lawyers are involved. We don't like to argue with anyone, but this is a very delicate matter. We've done what we had to do. If others are relaxed, then they're lucky.
“Salah wanted to leave and was convinced to go by his agent."