FC Porto striker Jackson Martinez has dropped the strongest hint yet that he wants leave the club - a declaration that is likely to spark renewed interest from Chelsea.

The Colombian forward scored 26 goals in 20 starts for Porto last season after joining from Chiapas and already has seven goals in six Primeira Liga games this term.

Martinez has been linked with a move to Chelsea in previous months but Jose Mourinho opted to add Samuel Eto'o to his artillery.

The 27 year old has ambitions of furthering his career despite having spent just 12 months at Porto, and says a deal relies on the Portuguese giants allowing him to leave.

"The years are passing and one day I hope to make a good transfer. It clearly depends on Porto, a club that sells its players so well," said Martinez. "Leaving or staying depends on Porto but I will only go if there is something concrete."

Despite claiming the league title in his maiden season in Portugal, questions remain over the standard of the division and Martinez is likely to want to test himself at a higher level.

Eto'o joined Chelsea in the summer from Anzhi Makhachkala but has scored just four goals in 12 games and with Fernando Torres' form inconsistent and Demba Ba's opportunities having been limited Mourinho may look for an additional forward to beef up the club's attack ahead of the sharp end of the Premier League season.

Latest reports are also linking Chelsea with a move for fellow-Colombian striker Radamel Falcao, who is looking for a quick exit from Monaco after moving from Atletico Madrid in the summer.

Should Chelsea want to land Martinez, Porto's reputation for bargaining in the transfer market, having sold players such as James Rodriguez, Hulk and Falcao for fees over £30m, means the Blues will require a massive offer.