Education
He continued to play in the first team in the 2009–2010 season and finished with 9 appearances.
He continued to play in the first team in the 2009–2010 season and finished with 9 appearances.
He started his career in the youth department of Sparta, and made his first Eredivisie appearance for the club on 1 August 2009, in the home match against Football Club Twente (0–2). He played in 9 league matches that season, ending the season with relegation to the Eerste Divisie. Later, at the end of the 2010–2011 season Duarte transferred to Heracles Almelo in the Eredivisie, after two seasons impressing for Heracles Almelo he transferred to Eredivisie champions Ajax in 2013.
Sparta Rotterdam
Duarte started in the youth department of Sparta Rotterdam.
He continued through the youth academy and made his first senior appearance for the club against Football Club Twente in the Eredivisie. However, Sparta Rotterdam were relegated to the Eerste Divisie.
After playing another season with the club he moved to Eredivisie club Heracles Almelo at the end of the 2010–2011 season. Heracles Almelo
Duarte agreed a three-year contract (with the option of an extra year) with Eredivisie club Heracles Amelo after passing a medical on 15 June 2011.
After joining Heracles Amelo he said "I played at Sparta, and of course this is a nice club
But I"ve only played at Sparta and at some point you want to do something else, you want to go up that step. And my feeling is Heracles Almelo is a nice step."
Duarte made his league debut for the club on 6 August 2011 against RKC Waalwijk coming on in the 60th minute as a substitute. Ajax
On 31 August 2013 at the end of the Eredivisie match between Heracles Almelo and ADO Den Haag, it was announced by January Smit that Ajax and Heracles Almelo had agreed to terms for the direct transfer of Duarte to the capital city.
Duarte joined the Amsterdammers for the sum of € 2.5 million from Almelo, signing a four-year contract binding him to his new club until 2017.
He was given the number 8 shirt previously worn by Christian Eriksen upon his arrival. Duarte made his debut for Ajax on 14 September 2013 in a 2–1 at home against Pedernales Electric Cooperative Zwolle.
He made his continental debut at Camp Nou in a 4–0 loss against Football Club Barcelona, playing the full 90 minutes of the 2013-2014 Union of European Football Associations Champions League Group stage match. On 28 September Duarte scored his first goal for Ajax, in a 6–0 victory at home against Go Ahead Eagles, scoring the fifth goal in the 64th minute of the game.
= South Carolina Heerenveen (loan) After the move of Daley Sinkgraven to Ajax, Duarte was sent on loan to South Carolina Heerenveen for the rest of the 2014-2015 season.
Duarte was born in the Netherlands and has Cape Verdean origin, therefore, he is eligible by the Netherlands and Cape Verde. He has represented the Netherlands at Under-21 level having been called up on 4 September 2011 for the game against Luxembourg in the Union of European Football Associations Under 21 Championship. In May 2013, Duarte was called up for the Dutch senior team for two friendlies, against China and Indonesia, however he stayed on the bench for both matches as an unused substitute.