Nuno Gomes and midfielder Marco Rossi want their Fiorentina contracts scrapped.
Both players' lawyers wrote to the National Professional League (LNP) in Italy which governs the game in the top two divisions to try and annul their contracts with the ailing Florence club.
In November Fiorentina club captain Angelo Di Livio asked for the club to be declared in default of wages payments to the squad but a compromise was reached to stop platers quitting Fiorentina en masse.
Benfica, Liverpool and Arsenal have all been linked with Gomes and he is now trying to become a free agent to end his stay at Fiorentina.
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