Vainqueur playing for Dynamo Moscow in 2014
|Date of birth||19 November 1988|
|Place of birth||Neuilly-sur-Marne, France|
|Height||1.79 m (5 ft 10 1⁄2 in)|
|Marseille (on loan from Roma)|
|2016–||→ Marseille (loan)||17||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 14:00, 18 February 2017 (UTC).
Born in Neuilly-sur-Marne, a commune in the eastern suburbs of Paris, Vainqueur joined Noisy-le-Grand FC at the age of 8. In 2001, he moved to the youth system of Auxerre. After one year, he returned to his birthplace, playing for Bussy-Saint-Georges FC. There he was discovered at the age 14 by FC Nantes. He progressed through youth system and in May 2007 signed his first professional contract with the Ligue 1 club.
In August 2011, he was transferred to Standard Liège and signed a five-year contract with the Belgian club. Near the end of a league game against Lierse in December 2013, Vainqueur received a red card when he accidentally kicked an opponent in the face.
- "William Vainqueur". L'Équipe (in French). Retrieved 4 October 2011.
- Aude, Prince (30 August 2015). "Un joueur d'origine haïtienne à l'AS Rome !". La National (in French). Retrieved 26 September 2016.
- Jacquin, Alexandre (25 September 2016). "OM : Vainqueur, made in Nantes". La Provence (in French). Retrieved 26 September 2016.
- "Joueur - William VAINQUEUR - FFF". Fédération Française de Football (in French). Retrieved 26 September 2016.
- "William Vainqueur" (in French). Standard Liège. 30 August 2011. Retrieved 4 October 2011.
- Hautmann, Thomas (2 December 2013). "Standard Liege player sent off for donkey kick to the face". foxsoccer.com. Retrieved 1 September 2014.
- Ванкер - в "Динамо"! (in Russian). FC Dynamo Moscow. 27 June 2014.
- Вильям Ванкёр перешел в «Рому» (in Russian). FC Dynamo Moscow. 31 August 2015.
- "William Vainqueur est Olympien" [William Vainqueur is Olympien] (in French). Olympique de Marseille. 31 August 2016. Retrieved 31 August 2016.
- Gaudot, Christophe (31 August 2016). "Mercato : William Vainqueur prêté à l'OM". francetvsport.fr (in French). Retrieved 26 September 2016.
- "William Vainqueur: Le Franco-Haïtien Proche de Dinamo Moscou". African Top Sports. Retrieved 12 July 2014.
- Aprilini, Davide, ed. (28 August 2015). "SCHEDA - William Vainqueur, possibile acquisto della Roma". Insider Roma. Retrieved 29 March 2016. (Italian)
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