Cape Town - Gonzalo Higuain will not be leaving Serie A club Napoli unless his release clause is met.
Any interested club must pay £67 million if they want to sign the former Real Madrid striker, according toteamtalk.com.
Arsenal, Liverpool and Manchester United have been linked with the 27-year-old but Napoli president Aurelio De Laurentiis is refusing to negotiate a better deal for the player.
De Laurentiis recently told fans "I wish" a club would buy Higuain, adding that he could buy eight players with the transfer fee received.
"The club stresses that the Argentine has an existing contract clause of £67million." the club announced last week.
"No bids below that figure will be accepted, those who want the player will have to match that valuation."
Higuain started his career in Argentina with River Plate before sealing a €12 million move to Real Madrid.
At Madrid, he won three league titles, as well as scoring 107 goals in 190 league appearances.
In July 2013, Real Madrid sold the striker to Napoli for €40 million.