The Colombia international, who has racked up 17 goals in 31 games this season, has been linked with a move to Europe recently but stressed that there are no official talks yet
The Colombia international announced last month that "several clubs" were tracking him and admitted that a move to Anfield would appeal to him, while it was reported in December that an €8 million (£6.5m) switch to the Dragao was also a possibility.
"I'm not in negotiations with Liverpool or Porto but both clubs have a personal interest in me," Martinez told Nuevo Estadio.
"I have not spoken to anyone as everything must go through the club or my agent. But in the next few months things should be finalised."
Martinez, who has been capped 10 times by his country, has netted seven goals in 14 games for Jaguares in the Mexican Primera Division so far this season.