Slovakian international claims he is 'happy' in Naples, but insists he has a right to consider moving to a bigger club even though his boss has shown resistance to a sale
The 23-year-old has been linked with a move to AC Milan after he claimed that joining the league champions would improve him as a player, though their CEO Adriano Galliani has already said they have no interest in the player.
But, speaking to Sky Sport Italia, Hamsik declared: "I am very happy at Napoli and I have no intention to leave soon.
"I think this has been clear, but if an offer from a big club arrives then I will think about it. Myself, the club who want me and, of course, Napoli would think about it."
De Laurentiis, though, has been quick to shoot down claims that Hamsik will be leaving - just days after saying he would listen to offers.
In a dramatic twist, the president appeared galvanised by fears of losing his star man and claimed he is off the market.
"I said it before, people cannot believe I will sell him for €40 million, and he is off the market," De Laurentiis told Radio Marte.
"He is an investment for us."
Meanwhile, David Trezeguet appears to be moving closer to joining the southern club as De Laurentiis seems encouraged by talk of a transfer for the Hercules man.
"We have spoken about this. Trezeguet went to Spain last year and did well. He is world class and has the right experience, but the choice is down to coach [Walter] Mazzarri," added the chief.
Earlier, Trezeguet's agent Antonio Caliendo said Napoli "would have priority" for the 33-year-old forward.
The Spanish club were relegated last season and the former Juventus man is expected to leave, despite his contract expiring in 2012.