# Jaime Oncins

Jaime Oncins (born 16 June 1970) is a former professional tennis player from Brazil.
Oncins represented his native country at the 1992 Summer Olympics in Barcelona, where he reached the quarterfinals before falling to Russia's Andrei Cherkasov. The right-hander won two individual career titles (Bologna and Búzios, both in 1992). He reached his highest singles ATP-ranking on May 3, 1993, when he became world No. 34.
Oncins' best performance at a major was at the 1992 French Open, where he reached the Round of 16, losing to eventual finalist, Petr Korda. In the second round of the tournament, Oncins had a famous victory from two sets down against former world No. 1 and three-time French Open champion, Ivan Lendl. Oncins was also the last player that Jimmy Connors beat at the US Open. Connors beat Oncins in straight sets in the first round of the 1992 US Open.
Oncins was a runner-up in the Roland Garros mixed doubles in 2001, with Paola Suárez from Argentina.

## Grand Slam finals
### Mixed doubles (1 runner-up)

| Result | Year | Championship | Surface | Partner | Opponents | Score |
| Loss | 2001 | French Open | Clay | Paola Suárez | Tomás Carbonell Virginia Ruano Pascual | 5–7, 3–6 |

## ATP career finals
### Singles: 5 (2 titles, 3 runner-ups)

* Legend
* Grand Slam Tournaments (0–0)
* ATP World Tour Finals (0–0)
* ATP Masters 1000 Series (0–0)
* ATP 500 Series (0–0)
* ATP 250 Series (2–3)
* Finals by surface
* Hard (1–3)
* Clay (1–0)
* Grass (0–0)
* Carpet (0–0)
* Finals by setting
* Outdoors (2–3)
* Indoors (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Oct 1991 | Búzios, Brazil | World Series | Hard | Jordi Arrese | 6–1, 4–6, 0–6 |
| Loss | 0–2 | Nov 1991 | São Paulo, Brazil | World Series | Hard | Christian Miniussi | 6–2, 3–6, 4–6 |
| Win | 1–2 | May 1992 | Bologna, Italy | World Series | Clay | Renzo Furlan | 6–2, 6–4 |
| Win | 2–2 | Nov 1992 | Búzios, Brazil | World Series | Hard | Luis Herrera | 6–3, 6–2 |
| Loss | 2–3 | Nov 1992 | São Paulo, Brazil | World Series | Hard | Luiz Mattar | 1–6, 4–6 |

### Doubles: 11 (5 titles, 6 runner-ups)

* Legend
* Grand Slam Tournaments (0–0)
* ATP World Tour Finals (0–0)
* ATP Masters 1000 Series (0–0)
* ATP 500 Series (1–0)
* ATP 250 Series (4–6)
* Finals by surface
* Hard (1–1)
* Clay (4–5)
* Grass (0–0)
* Carpet (0–0)
* Finals by setting
* Outdoors (5–6)
* Indoors (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Jan 1991 | Wellington, New Zealand | World Series | Hard | John Letts | Luiz Mattar Nicolás Pereira | 6–4, 6–7, 2–6 |
| Loss | 0–2 | Apr 1991 | Madrid, Spain | World Series | Clay | Luiz Mattar | Gustavo Luza Cássio Motta | 0–6, 5–7 |
| Loss | 0–3 | May 1991 | Bologna, Italy | World Series | Clay | Luiz Mattar | Luke Jensen Laurie Warder | 4–6, 6–7 |
| Win | 1–3 | Nov 1991 | São Paulo, Brazil | World Series | Hard | Andrés Gómez | Jorge Lozano Cássio Motta | 7–5, 6–4 |
| Win | 2–3 | Feb 1993 | Mexico City, Mexico | World Series | Clay | Leonardo Lavalle | Horacio de la Peña Jorge Lozano | 7–6, 6–4 |
| Loss | 2–4 | Aug 1993 | Prague, Czech Republic | World Series | Clay | Jorge Lozano | Hendrik Jan Davids Libor Pimek | 3–6, 6–7 |
| Win | 3–4 | Mar 1999 | Casablanca, Morocco | World Series | Clay | Fernando Meligeni | Massimo Ardinghi Vincenzo Santopadre | 6–2, 6–3 |
| Win | 4–4 | Jun 1999 | Merano, Italy | World Series | Clay | Lucas Arnold Ker | Marc-Kevin Goellner Eric Taino | 6–4, 7–6 |
| Win | 5–4 | Jul 1999 | Stuttgart, Germany | Championship Series | Clay | Daniel Orsanic | Aleksandar Kitinov Jack Waite | 6–2, 6–1 |
| Loss | 5–5 | Apr 2001 | Munich, Germany | International Series | Clay | Daniel Orsanic | Petr Luxa Radek Štěpánek | 7–5, 2–6, 6–7$^{(5–7)}$ |
| Loss | 5–6 | May 2001 | Sankt Pölten, Austria | International Series | Clay | Daniel Orsanic | Petr Pála David Rikl | 3–6, 7–5, 5–7 |

## ATP Challenger and ITF Futures finals
### Singles: 13 (8–5)

* Legend
* ATP Challenger (8–5)
* ITF Futures (0–0)
* Finals by surface
* Hard (2–3)
* Clay (6–1)
* Grass (0–0)
* Carpet (0–1)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | Aug 1989 | Lins, Brazil | Challenger | Clay | Fernando Roese | 1–6, 6–0, 6–3 |
| Win | 2–0 | Jul 1990 | Campos do Jordão, Brazil | Challenger | Hard | Jose Daher | 6–2, 6–2 |
| Loss | 2–1 | Aug 1990 | Brasília, Brazil | Challenger | Carpet | Cássio Motta | 6–7, 4–6 |
| Loss | 2–2 | Oct 1990 | Manaus, Brazil | Challenger | Hard | Luis-Enrique Herrera | 2–6, 5–7 |
| Win | 3–2 | Nov 1990 | São Paulo, Brazil | Challenger | Clay | Francisco Yunis | 6–3, 6–3 |
| Win | 4–2 | Oct 1991 | São Paulo, Brazil | Challenger | Clay | Fernando Roese | 6–4, 6–4 |
| Loss | 4–3 | May 1992 | São Paulo, Brazil | Challenger | Hard | Luis-Enrique Herrera | 2–6, 6–3, 4–6 |
| Loss | 4–4 | Oct 1992 | Recife, Brazil | Challenger | Hard | Luiz Mattar | 6–7, 7–5, 5–7 |
| Win | 5–4 | Sep 1993 | Natal, Brazil | Challenger | Clay | Marcelo Ingaramo | 3–6, 6–2, 6–3 |
| Win | 6–4 | Jun 1995 | Asunción, Paraguay | Challenger | Clay | Gastón Etlis | 6–3, 6–4 |
| Loss | 6–5 | Jun 1996 | Medellín, Colombia | Challenger | Clay | Mauricio Hadad | 6–2, 3–6, 1–6 |
| Win | 7–5 | Aug 1996 | Belo Horizonto, Brazil | Challenger | Hard | Maurice Ruah | 6–4, 6–3 |
| Win | 8–5 | Oct 1996 | Seoul, South Korea | Challenger | Clay | Patrik Fredriksson | 1–6, 6–1, 6–2 |

### Doubles: 17 (11–6)

* Legend
* ATP Challenger (11–6)
* ITF Futures (0–0)
* Finals by surface
* Hard (2–3)
* Clay (8–3)
* Grass (0–0)
* Carpet (1–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Jul 1989 | São Paulo, Brazil | Challenger | Clay | Otavio Della | David Macpherson Gerardo Mirad | 6–2, 6–7, 2–6 |
| Win | 1–1 | Jul 1990 | Campos do Jordão, Brazil | Challenger | Hard | Jose Daher | Nelson Aerts Fernando Roese | 7–6, 6–4 |
| Win | 2–1 | Aug 1990 | Brasília, Brazil | Challenger | Carpet | Andrew Sznajder | Luiz Mattar Fernando Roese | 7–5, 3–6, 7–6 |
| Win | 3–1 | Apr 1991 | Lisbon, Portugal | Challenger | Clay | David Adams | Tarik Benhabiles Olivier Delaître | 5–7, 6–2, 6–3 |
| Win | 4–1 | Oct 1991 | São Paulo, Brazil | Challenger | Clay | Luiz Mattar | Juan-Ignacio Garat Marcelo Saliola | 6–4, 6–4 |
| Loss | 4–2 | Jun 1992 | Yvetot, France | Challenger | Clay | Tomas Anzari | Mårten Renström Mikael Tillström | 6–7, 7–5, 2–6 |
| Loss | 4–3 | Oct 1992 | Recife, Brazil | Challenger | Hard | Luiz Mattar | Sébastien Lareau Daniel Nestor | 7–5, 4–6, 6–7 |
| Win | 5–3 | Nov 1992 | São Luis, Brazil | Challenger | Hard | Luiz Mattar | Maurice Ruah Mario Tabares | 6–3, 7–5 |
| Loss | 5–4 | Sep 1993 | Natal, Brazil | Challenger | Clay | Luiz Mattar | Stephen Noteboom Jack Waite | 6–4, 0–6, 3–6 |
| Loss | 5–5 | Nov 1993 | São Luis, Brazil | Challenger | Hard | Luiz Mattar | Otavio Della Marcelo Saliola | 7–6, 3–6, 6–7 |
| Win | 6–5 | Feb 1996 | Punta del Este, Uruguay | Challenger | Clay | Gustavo Kuerten | Alejandro Hernández Simon Touzil | 5–7, 6–4, 7–6 |
| Loss | 6–6 | Oct 1996 | Tanagura, Japan | Challenger | Hard | Max Mirnyi | Brian Macphie Roger Smith | 4–6, 4–6 |
| Win | 7–6 | Oct 1997 | Santiago, Chile | Challenger | Clay | Lucas Arnold Ker | Diego del Río Mariano Puerta | 6–2, 6–2 |
| Win | 8–6 | Jun 1998 | Eisenach, Germany | Challenger | Clay | Cristiano Testa | Rene Nicklisch Patrick Sommer | 6–1, 6–3 |
| Win | 9–6 | Jul 1998 | Ulm, Germany | Challenger | Clay | Márcio Carlsson | Dirk Dier Michael Kohlmann | 6–4, 6–7, 6–3 |
| Win | 10–6 | Sep 1998 | Florianópolis, Brazil | Challenger | Clay | André Sá | Marcelo Filippini Gonzalo Rodriguez | 6–0, 6–1 |
| Win | 11–6 | Oct 1999 | São Paulo, Brazil | Challenger | Clay | Daniel Orsanic | Mariano Hood Sebastián Prieto | 6–2, 6–2 |

## Performance timelines

Key :
| W | F | SF | QF | #R | RR | Q# | DNQ | A | NH |

### Singles

| Tournament | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | SR | W–L | Win % |
| Grand Slam tournaments ||||||||||||||
| Australian Open | A | 3R | 1R | A | A | A | A | A | A | A | 0 / 2 | 2–2 | 50% |
| French Open | A | 2R | 4R | 2R | Q3 | A | Q2 | Q1 | Q2 | Q1 | 0 / 3 | 5–3 | 63% |
| Wimbledon | Q1 | 1R | A | A | A | A | A | A | A | A | 0 / 1 | 0–1 | 0% |
| US Open | A | 1R | 1R | 1R | A | A | 1R | 1R | A | A | 0 / 5 | 0–5 | 0% |
| Win–loss | 0–0 | 3–4 | 3–3 | 1–2 | 0–0 | 0–0 | 0–1 | 0–1 | 0–0 | 0–0 | 0 / 11 | 7–11 | 39% |
| Olympic Games ||||||||||||||
| Summer Olympics | NH | NH | QF | Not Held | Not Held | Not Held | A | Not Held | Not Held | Not Held | 0 / 1 | 3–1 | 75% |
| ATP Masters Series ||||||||||||||
| Indian Wells | A | A | A | 1R | A | A | Q2 | A | A | A | 0 / 1 | 0–1 | 0% |
| Miami | A | 2R | 1R | 2R | 1R | Q2 | Q1 | Q2 | A | A | 0 / 4 | 1–4 | 20% |
| Monte Carlo | A | A | A | 1R | A | A | A | A | A | A | 0 / 1 | 0–1 | 0% |
| Hamburg | A | A | A | 3R | A | A | A | A | A | A | 0 / 1 | 2–1 | 67% |
| Rome | A | A | A | 1R | A | A | A | A | A | A | 0 / 1 | 0–1 | 0% |
| Win–loss | 0–0 | 1–1 | 0–1 | 2–5 | 0–1 | 0–0 | 0–0 | 0–0 | 0–0 | 0–0 | 0 / 8 | 3–8 | 27% |

### Doubles

| Tournament | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | SR | W–L | Win % |
| Grand Slam tournaments |||||||||||||||
| Australian Open | A | 1R | A | A | A | A | A | A | A | 1R | A | 0 / 2 | 0–2 | 0% |
| French Open | 1R | 1R | 3R | 1R | A | A | A | A | 2R | SF | 1R | 0 / 7 | 7–7 | 50% |
| Wimbledon | 1R | A | A | A | A | A | A | A | 1R | 3R | A | 0 / 3 | 2–3 | 40% |
| US Open | 2R | 1R | 1R | A | A | A | A | A | 1R | 3R | 2R | 0 / 6 | 4–6 | 40% |
| Win–loss | 1–3 | 0–3 | 2–2 | 0–1 | 0–0 | 0–0 | 0–0 | 0–0 | 1–3 | 8–4 | 1–2 | 0 / 18 | 13–18 | 42% |
| National Representation |||||||||||||||
| Olympic Games |||||||||||||||
| Summer Olympics | NH | 1R | Not Held | Not Held | Not Held | A | Not Held | Not Held | Not Held | 1R | NH | 0 / 2 | 0–2 | 0% |
| Year-End Championships |||||||||||||||
| ATP Finals | Did not qualify | Did not qualify | Did not qualify | Did not qualify | Did not qualify | Did not qualify | Did not qualify | Did not qualify | Did not qualify | RR | DNQ | 0 / 1 | 1–2 | 33% |
| ATP Masters Series |||||||||||||||
| Indian Wells | A | A | A | A | A | A | A | A | A | 1R | A | 0 / 1 | 0–1 | 0% |
| Miami | A | A | 1R | 1R | A | A | A | A | A | 2R | 2R | 0 / 4 | 2–4 | 33% |
| Monte Carlo | A | A | A | A | A | A | A | A | A | A | SF | 0 / 1 | 3–1 | 75% |
| Hamburg | A | A | QF | A | A | A | A | A | A | QF | QF | 0 / 3 | 6–3 | 67% |
| Rome | A | A | 2R | A | A | A | A | A | A | QF | 2R | 0 / 3 | 4–3 | 57% |
| Canada | A | A | A | A | A | A | A | A | A | A | 1R | 0 / 1 | 0–1 | 0% |
| Stuttgart | A | A | A | A | A | A | A | A | A | QF | A | 0 / 1 | 2–1 | 67% |
| Paris | A | A | A | A | A | A | A | A | A | 1R | A | 0 / 1 | 0–1 | 0% |
| Win–loss | 0–0 | 0–0 | 3–3 | 0–1 | 0–0 | 0–0 | 0–0 | 0–0 | 0–0 | 7–6 | 7–5 | 0 / 15 | 17–15 | 53% |