Spanish sources claim Lionel Messi is trying to convince his side, and Argentina team-mate Aguero, 23, to come together.
The Ballon d`Or holder is said to be eager to join forces with his compatriot and form a sesational partnership at Camp Nou next season.
Atletico have already added pressure on the forward to decide what he wants to do within the next two weeks as they are keen on planning for next season and they want to know whether they can count on him.
Despite the reports of a possible late surge by Barcelona, who are still keen on closing a deal for Udinese`s Alexis Sanchez - also wanted by Manchester City, Juventus seem in pole for Aguero.
Giuseppe Marotta already confirmed he is "a player liked" by the Italian giants and will be meeting the player`s representatives next week.
Villarreal`s Giuseppe Rossi is also a target for Juventus, but Aguero would appear to be a priority. To land him though, they would need at least €45 million so they can meet Atleti`s buy-out clause and start concrete talks with the Spanish side.
Aguero is tied to the Vicente Calderon club until 2014.