Born in Italy to Brazilian parents, he is the eldest child of former player Mazinho. Thiago joined Barcelona aged 14, and made his first team debut in 2009. After winning honours including four La Liga titles, the UEFA Champions League and the FIFA Club World Cup for Barcelona, he was signed by Bayern Munich for €25 million in 2013. In Germany, Thiago won 16 trophies, including the Bundesliga seven times in a row, and the UEFA Champions League as part of a continental treble in his final year at the club. In 2020, he signed for Liverpool in a transfer worth an initial £20 million.