The highly-rated midfielder has entered the final year of his contract, with club chiefs apparently not willing to offer the player a contract extension.
With the 32-year-old missing the start of the season through injury, the Eagles are prepared to cash in on the player in January, especially seeing that he remains one of the highest earners at the club.
Despite the slow start to the current season, Aimar is still held in high regard by the world’s top clubs, although a return to South America looks on the cards.
River Plate, a club where it all started for the midfielder, are thought to be leading the race, but Santos, Independiente and clubs from the Middle East are also showing interest.
Pablo Aimar is thus set to leave Benfica after making 98 league appearances during four and a half years at the club.