Manchester City striker Sergio Aguero will join Barcelona on a two-year contract when his contract expires at the end of June.
The Argentine, 32, leaves City after 10 years at the club, during which he became their all-time leading goal scorer with 260 goals in 390 games.
His last appearance came off the bench in Saturday’s Champions League final defeat by Chelsea.
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“We all know that Barcelona are the best club in the world,” said Aguero.
“I think I made a great decision to be here and of course it is a step forward in my career.
“I am really happy and hopefully I can help the team to win things.”
Aguero will have a buyout clause of 100m euros (£86m) at Barcelona.