|Full name||Leonardo Campos Duarte da Silva|
|Date of birth||17 July 1996|
|Place of birth||Mococa, Brazil|
|Height||1.86 m (6 ft 1 in)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 09:44, 11 November 2019 (UTC)|
Duarte spend most of his youth career at Flamengo winning multiples competitions, the most important was the 2016 Copa São Paulo de Futebol Júnior, the top youth tournament in Brazil, being the team captain and lifting the trophy. He had a solid tournament, being praised and along with Felipe Vizeu and Ronaldo, Duarte received has been praised as a player ready to be promoted to the professional team. Few weeks later all three players started training with the professional team.
Due to injuries and transfers throughout the 2016 season Duarte played in another eight matches, including seven in the 2016 Brazilian Série A and one appearance in 2016 Copa do Brasil, all matches as starter. His first Brazilian Série A match was on 14 May 2016 in a 1-0 win against Sport at Estádio Raulino de Oliveira in Volta Redonda.
On 22 August 2018 Duarte extended his contract with Flamengo until December 2022.
On 27 July 2019, Brazilian press announced the agreement between Flamengo and Milan in a €10 million transfer with a clause that could potentially rise to €11 million. On 7 August 2019, Duarte was officially announced as a Milan player on a five-year deal.
On 29 September 2019 he played his first game with A.C. Milan
- As of match played 10 November 2019.
- "Flamengo é tricampeão da Copa São Paulo de Futebol Jr". flamengo.com.br. 25 January 2016. Retrieved 19 July 2016.
- "Flamengo reage, derrota o Corinthians nos pênaltis e conquista a Copa SP". uol.com.br. 25 January 2016. Retrieved 19 July 2016.
- "Base decide, Muralha pega pênalti, e Fla vence Bangu de virada por 3 a 1". globoesporte.com. 5 March 2016. Retrieved 5 January 2017.
- "Flamengo vence Sport por 1 a 0 com baixo ritmo e poucas chances de gol". UOL. 14 May 2016. Retrieved 29 August 2018.
- "Flamengo anuncia renovação de contrato com zagueiro Léo Duarte". globoesporte.com. 22 August 2018. Retrieved 29 August 2018.
- "Com indicação de Serginho e aval de Maldini, Léo Duarte vai assinar por cinco anos com o Milan". globoesporte.com (in Portuguese). 27 July 2019. Retrieved 29 July 2019.
- "Léo Duarte is Rossonero". A.C. Milan. 7 August 2019. Retrieved 7 August 2019.
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