Reports in Spain suggest that Messi has implored Barca to unite him with Aguero, after the pair enjoyed success at international level at both the Under 20 World Cup in 2005 and the 2008 Olympics.

The Catalan club made enquiries about signing Aguero prior to signing Neymar last summer, and even held a series of "very serious" meetings with the 25-year-old's advisors.

The signing of Neymar has alleviated Barcelona's need for Aguero, but the club have reportedly left the door open to signing the player following Messi's intervention.

According to El 9 Esportiu, a source close to Aguero has said: "He's crazy about Barca."

Indeed, the publication reports that the former Atletico Madrid striker is keen on a change of scenery, misses Spain, and believes he would fit in "perfectly" at Barcelona.