Sebastián Prieto (born May 19, 1975, in Buenos Aires) is a professional tennis player from Argentina.
Primarily a doubles specialist, Prieto has won 9 doubles titles in his career. He began playing for the Argentina Davis Cup team in 1999.
| Legend |
| Grand Slam (0) |
| Tennis Masters Cup (0) |
| ATP Masters Series (0) |
| ATP Championship Series (1/0) |
| ATP Tour (9/0) |
| Outcome | No. | Date | Tournament | Surface | Partnering | Opponent in the final | Score |
| Winner | 1. | November 9, 1998 | Santiago, Chile | Clay | Mariano Hood | Massimo Bertolini Devin Bowen |
7–6, 6–7, 7–6 |
| Winner | 2. | October 4, 1999 | Palermo, Italy | Clay | Mariano Hood | Lan Bale Alberto Martín |
6–3, 6–1 |
| Winner | 3. | January 28, 2001 | Bogotá, Colombia | Clay | Mariano Hood | Martín Rodríguez André Sá |
6–2, 6–4 |
| Winner | 4. | February 17, 2003 | Buenos Aires, Argentina | Clay | Mariano Hood | Lucas Arnold Ker David Nalbandian |
6–2, 6–2 |
| Winner | 5. | July 18, 2005 | Stuttgart, Germany | Clay | José Acasuso | Mariano Hood Tommy Robredo |
7–6(4), 6–3 |
| Winner | 6. | September 12, 2005 | Bucharest, Romania | Clay | José Acasuso | Victor Hănescu Andrei Pavel |
6–3, 4–6, 6–3 |
| Winner | 7. | January 30, 2006 | Viña del Mar, Chile | Clay | José Acasuso | František Čermák Leoš Friedl |
7–6(2), 6–4 |
| Winner | 8. | February 19, 2007 | Buenos Aires, Argentina | Clay | Martín García | Albert Montañés Rubén Ramírez Hidalgo |
6–4, 6–2 |
| Winner | 9. | February 2, 2008 | Viña del Mar, Chile | Clay | José Acasuso | Máximo González Juan Mónaco |
6–1, 3–0, ret. |
| Winner | 10. | February 21, 2010 | Buenos Aires, Argentina | Clay | Horacio Zeballos | Simon Greul Peter Luczak |
7–6(4), 6–3 |