The Colombian hit-man is one of European football’s most sought after forwards, with his goalscoring record – better than two in three – having been impressive since his move to Portugal from Mexican side Chiapas in 2012.
Although a key man at Porto, Martinez is expected to leave either in January or at the end of the season, after hinting that he’s keen to test himself in one of the world’s top leagues.
Arsenal and Liverpool have since been strongly linked with the player, who is valued at £40m by his employers.
But Spurs are now also in the mix, with manager Mauricio Pochettino desperate to add a proven marksman to his ranks.
The Argentine has not been convinced by Roberto Soldado – who netted his first league goal in nine months over the weekend – while Emmanuel Adebayor’s work-rate and commitment to the club has been questioned.
Martinez is seen as the ideal man to lead the line by the Argentine, who believes that he could thrive off the service given by star playmaker Christian Eriksen.
A potential stumbling block could be Spurs’ lack of Champions League action, with the Londoners having failed to qualify over the course of the last two seasons.