Marco Verratti’s future at Paris Saint-Germain has been thrown into doubt after he reportedly asked to leave the French champions on Thursday.
The Italian midfielder, 20, has a contract that runs until 2017 but Napoli and Fiorentina are both keen on him after an impressive first season in Ligue 1.
PSG want to keep Verratti but the two parties have so far been unable to reach an agreement on a significant pay rise.
Potential suitors will be on high alert after an apparently unsuccessful meeting on Thursday between Verratti’s agent, Donato Di Campli, and PSG managing director Jean-Claude Blanc.
“We’re not happy,” Di Campli told L’Equipe. "The situation is starting to become difficult.
"We even asked the club to allow him to leave but this permission was not granted."
L’Equipe says PSG have offered to double Verratti’s salary but that the former Pescara player is holding out for between €3-4 million per year.
Another meeting between Di Campli and Blanc is scheduled for next week, while Napoli were told on Thursday that the Italian international - thought to be valued at between €20-25 million - was not for sale.
Verratti is the latest in a line of PSG players who have sought to renegotiate their contracts since leading the club to its first French league title in 19 years.
Brazilian defender Thiago Silva, who returned to training on Thursday, recently received a pay rise to see off interest from Barcelona, while 30-goal striker Zlatan Ibrahimovic will meet the club president next week.
Midfielder Blaise Matuidi, who had an excellent season, is also set for contract negotiations.