3) Jackson Martinez (Porto)
Although the Porto striker has just signed a new contract with the club after a summer of strong rumours linking him with the likes of Arsenal, Atletico Madrid and Valencia, Jackson Martinez could be a quality signing for Liverpool if they meet his release clause, which has actually been lowered to £27m in his new contract terms. The prolific Colombian is a great goalscorer and skillful performer upfront, and will surely make the move to a bigger club in the near future after clearly becoming too good for the Portuguese top flight.