Napoli had a deal to sign Tim Matavz, but in a surprise twist Groningen released a statement confirming he was no longer for sale.
The tall striker had been on the verge of a move to the San Paolo in January, but his agent assured it was only postponed for six months.
However, Groningen released an official statement late Friday night declaring that Matavz is off the market.
“The desire of the player to stay with Groningen proved decisive. Negotiations with Napoli have been completely interrupted.”
His contract with the Dutch club runs until June 2013.