|Full name||António Manuel Tavares Fonseca|
|Date of birth||30 January 1965|
|Place of birth||Lisbon, Portugal|
|Height||1.72 m (5 ft 7 1⁄2 in)|
|Playing position||Left back|
|* Senior club appearances and goals counted for the domestic league only.
During 11 seasons, he amassed Primeira Liga totals of 199 games and two goals, representing in the competition Benfica, Vitória de Guimarães and Estrela da Amadora. He finished his career in Canada, where he started working as a manager in 1999.
Born in Lisbon, Fonseca played youth football for five clubs, finishing his grooming at local S.L. Benfica. From 1983 to 1987 he competed in the Segunda Liga, after which the former bought him from F.C. Tirsense.
During his three-year tenure with Benfica, Fonseca was first-choice in the 1988–89 campaign as the team won the Primeira Liga championship and also reached the final of the Taça de Portugal, but played second-fiddle to Álvaro Magalhães and Samuel Quina in the other two. In eight of the following nine seasons he continued to play in the top flight, with Vitória S.C. and C.F. Estrela da Amadora, appearing regularly for both sides and reuniting at the latter with former Benfica teammates Edmundo, José Carlos, Fernando Mendes and Paulinho.
Fonseca earned four caps for Portugal, over one year. He made his debut on 29 March 1989, playing the entirety of a 6–0 friendly win over Angola with marked the 75th anniversary of the Portuguese Football Federation.
During five years, Fonseca served as assistant to Stephen Hart and Dale Mitchell at the Canadian national team, while also being in charge of the under-23s. Already as a technical director for the Canadian Soccer Association, he acted as interim for the full side following the departure of Colin Miller, who later replaced him after two friendlies.
- Tovar 2012, p. 491.
- Tovar 2012, p. 498.
- "Nº194 – Fonseca" (in Portuguese). Vedeta ou Marreta?. 15 September 2010. Retrieved 4 September 2015.
- "Whitecaps FC appoint Carl Robinson as head coach". Vancouver Whitecaps. 16 December 2013. Retrieved 4 September 2015.
- "Canada Soccer announces Fonseca as new technical director". Canada Soccer. 6 November 2012. Retrieved 4 September 2015.
- "Tony Fonseca ready to lead Canada in men's soccer friendlies". Canadian Broadcasting Corporation. 14 March 2013. Retrieved 4 September 2015.
- "Canadian men's soccer team drops hard-fought friendly". Canadian Broadcasting Corporation. 22 March 2013. Retrieved 4 September 2015.
- Tovar, Rui Miguel (2012). Almanaque do Benfica [Benfica Almanac]. Portugal: Lua de Papel. ISBN 978-989-23-2087-8.