Arsenal also interested in prolific striker.
Liverpool will have to pay big money to sign Porto striker Jackson Martinez, who has an asking price of £40m this January, according to the Daily Express.
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The 28-year-old has a superb scoring record for the Portuguese giants and could make a great signing for any top club, though he won’t come cheap this winter, it would seem.
Liverpool are desperate to improve their options upfront after losing Luis Suarez to Barcelona this summer, and Martinez certainly fits the bill as the likes of Mario Balotelli and Rickie Lambert struggle.
Arsenal are also interested in the Colombian, however, and may provide strong competition for his signature this January.