Former Manchester City's player, Argentine forward Sergio Aguero poses on the pitch of the Camp Nou stadium in Barcelona during his official presentation as new player of FC Barcelona on May 31, 2021. - Barcelona have signed Argentinian forward Sergio Aguero on a deal until 2023, the Catalan giants announced today. In a statement, Barca said that Aguero, who arrives after a decade at Manchester City, has a buy-out clause "set at 100 million euros ($122 million)." (Photo by LLUIS GENE / AFP)