He blossomed as a goalscorer, and helped the team win a La Liga title, a Copa del Rey title, and a UEFA Super Cup.
His performances attracted the attention of several big clubs, and in 2014 Costa was transferred to Premier League club Chelsea in a deal worth €35 million (£32 million).
In London, Costa won three trophies, including two Premier League titles, and a League Cup.
He played twice for Brazil in 2013, before declaring his desire to represent Spain, having been granted Spanish citizenship in September that year.
He made his debut for Spain in March 2014, and has since won 24 caps and scored 10 goals, and has represented them at the 2014 and 2018 FIFA World Cups.Known for his fiery temperament, Costa has been criticized and punished for several confrontations with opponents.