Arsenal and Chelsea must pay at least £25million if they want to sign Jackson Martinez this summer, as additional interest from AS Roma and Napoli has driven up the Porto striker's valuation.
TalkSPORT reports how the 27-year-old has attracted admiring glances from a host of top European clubs in recent months, following a series of stunning performances at Estadio do Dragao in the past two seasons.
Martinez has netted a mightily impressive 41 goals in just 53 league appearances for the Primeira Liga giants, and could now be finally set to leave Portugal when the transfer window reopens in the summer.
Gunners boss Arsene Wenger is believed to be a long-term admirer of the Colombia international, and is weighing up the prospect of a bid to bring him to the Emirates Stadium.
However, Arsenal are unlikely to want to get involved in a four-way transfer tug-of-war, particularly with Chelsea on the scene, given Jose Mourinho's financial muscle with the backing of Stamford Bridge owner Roman Abramovich.
Both Premier League clubs are yet to firm up their alleged interest in Martinez, but formal enquiries from Italy are now understood to have increased the player's initial valuation, with Porto keen to negotiate as much money as possible for the star striker.
The South American remains under contract with Luis Castro's side until 2016, and talks have been held over extending that deal, but it's anticipated that Martinez might well leave Porto if a lucrative offer for both player and club is received in the summer.