Officially unveiled at Camp Nou on Monday afternoon, Aguero has signed a two-year deal with Barca and will be able to link up with the rest of the squad after his Manchester City contract expires on June 30.
He will join Messi on international duty before then, with Argentina set to contest World Cup qualifiers against Chile and Colombia before the Copa America begins.
Aguero and Messi are close friends, having been teammates at international level for the last 15 years and roommates when they were youngsters. Aguero has previously said that Messi is “like a brother”.
Speaking in his first press conference as a Barcelona player, Aguero sounded confident that he and Messi will be teammates at club level next season. “Let’s hope we can play together, of course,” he said.
“As president [Joan] Laporta said, we’ve been negotiating for a long time and whatever happens with Leo will be his decision along with the club.
Will Sergio Aguero be a success at Barcelona? Comment below
“Obviously, it would be a pleasure and it would make me very proud to play together. I’ve played with him in the [Argentina] national team since we were kids, I know him quite well and I hope we can play together here.
“I think we will, but let’s hope we can do the best for the club.”
Aguero also revealed Pep Guardiola’s parting message to him when he spoke to the former Barca boss about his intention to swap the Etihad for Camp Nou. “The only thing that I remember is that, when we won the Premier League, we had lunch,” he said.
“He said to me: ‘You’re going to the best club in the world.’ Those were the last words.”
Aguero leaves City with 260 goals in 390 appearances, making him the club’s all-time top goalscorer by some distance.
He won the Premier League five times during his time in England, while he has six League Cup winner’s medals and also triumphed in the FA Cup.
Nonetheless, he admitted that it was a dream to join Barca. “I said before to president Laporta that, when I was a kid, I said that one day [Barcelona] would want me, one day they’d look at me,” he said.
“It happened, of course. When this opportunity came… any player who you give this opportunity to will come running. That’s what I did.”
Sign up to the Mirror Football email here for the latest news and transfer gossip.