Rumour: Manchester United & Arsenal could move for Porto's Jackson Martinez

Portp’s highly rated forward Jackson Martinez

Manchester United, Chelsea, Spurs and Arsenal have been given the green light to make a move for Porto striker Jackson Martinez after his agent admitted interest was concrete from elsewhere, report The Express.

Porto have insisted that any interested club must meet the Colombian’s £32 million release clause, however, the player’s Italian agent, Peppino Tirri, says the club are ready to do business now to avoid losing him for nothing next summer – when Martinez’s contract expires.

Martinez has been highly-sought after by a number of teams across Europe and the 27-year-old looks set to move for pastures new this summer.

His agent, Tirri, admits the interest is coming in for Martinez, with Roma particularly keen.

Tirri told reporters: “Roma are seriously thinking about signing him.

“Porto cannot risk a player like him going towards the end of his contract.

In that case, the buy-out clause would no longer apply.”

Martinez reportedly wants to move to the Premier League and recently admitted that he would prefer a move to Manchester United over Roma, but did admit Napoli, who are also interested in Javier Mascherano, remained a possible attraction for him this summer.

It is unknown yet how low Porto will drop their asking price for Martinez, however, it is almost certain he will not sign a new deal meaning the Portuguese outfit will look to sell him this summer.