Virgil van Dijk claims he knows nothing of interest from English clubs and is keen to prove himself in the Champions League with Celtic.
QPR loanee Tom Carroll wants to "make it at Tottenham" but is prepared to consider all of his options at the end of the season.
Both players have been granted permission by the Florence-based club to undergo a medical with Napoli before completing permanent transfers to the azzurri outfit.
A statement from Fiorentina read: "After the negotiations undertaken by ACF Fiorentina and SCC Napoli, our players Valon Behrami and Alessandro Gamberini have been authorised to undergo medicals with Napoli."
Behrami, a Swiss midfielder, joined Fiorentina in 2005 from Bologna.
The 27-year-old is set to sign a three-year deal with the Partenopei side.
Italian central defender Gamberini, meanwhile, is expected to put pen to paper on a contract that will keep him tied to Napoli until June 2016.