Tottenham Hotspur have stepped up their interest in Porto striker Jackson Martinez as they look to bolster their attack in January, according to talkSPORT.

The Colombian striker has stamped his authority as one of the most prolific strikers in the world in recent years, scoring for fun in the Portuguese league and will be an apt replacement for the misfiring Roberto Soldado and Emmanuel Adebayor.

The duo have failed to live up to expectations at White Hart Lane and are preparing for an exit out of London, with Mauricio Pochettino already looking at options to bolster his side's chances to qualify for the top four.

Martinez has scored 12 goals thus far in the campaign in only 16 appearances and is looking the real deal as he faces interest from two other Premier League clubs in the form of Liverpool and Arsenal.

The Reds need a striker to provide cover for Daniel Sturridge, who has failed to shrug off his injury worries and has been deemed out for the rest of the year after he pricked his thigh in training, days before making his much anticipated return to first team action.

Mario Balotelli has flattered to deceive in a Reds shirt thus far and Brendan Rodgers is looking to offload the Italian and make room for Martinez, who will provide apt cover for Luis Suarez, whose departure has had a significant effect on their chances of keeping their position in the top four.

Arsenal are also in the market for a striker in the mould of Martinez, given Danny Welbeck has failed to live up to expectations in an Arsenal shirt thus far. Olivier Giroud was down injured for a major part of the season when Welbeck was given the opportunity by Wenger to ply through the middle.

However, the former Manchester United man has managed only two goals thus far in the league and has been found wanting at times up front, a weakness which Wenger has to address in the upcoming window.