The Colombian forward has been one European football’s most prolific marksmen since his move to Portugal from Mexican side Chiapas in 2012, registering a goalscoring record of around two in three.
And with Spurs boss Mauricio Pochettino having set his sights on a deadly hit-man for the coming transfer window, Martinez has emerged as his top target.
But Liverpool, and Arsenal, are also keen on the South American, which has prompted talk of a bidding war in the New Year.
However Pochettino is ready to make Soldado available to Porto, in the hope that a ready-made replacement being on offer may tilt the scales in their favour.
The former Valencia man cost the Londoners £26m last summer, but has been a major flop at White Hart Lane – his goal against Everton last weekend was his first in the league in nine months.
Porto have indicated that they’re not ready to offload Martinez in January, but the player himself has stalled contract negotiations, which may alter their stance.