Mariano Rubén Puerta (; born 19 September 1978) is an Argentine tennis coach and a former professional player. He reached a career-high ATP world No. 9 singles ATP rankings in August 2005. His career highlight is reaching the final of the French Open in 2005.
Shortly afterwards he tested positive for the banned substance etilefrine in a drugs test, for which he received an eight-year doping ban, subsequently reduced to two years on appeal.
Besides from not recovering his previous playing level, he was suspended from tennis for 9 months from October 2003 onwards for a doping offense (see section on doping controversies). Owing to the suspension he missed most of the 2004 season, and by August 2004 his world ranking had dropped to No. 440. He was reduced to playing Challenger-level tournaments for a while until he had earned enough points to return to the ATP Tour.
In 2005, Puerta made an eye-opening comeback on the Tour by winning the title in Casablanca and then making it to the final of the world's most prestigious clay court tournament, the French Open, where he eventually succumbed to Rafael Nadal in a close match (7–6(8–6), 3–6, 1–6, 5–7). By August 2005 he had climbed to a career-best World No. 9 in the ATP singles rankings, an advancement of 431 places in one year.
In December 2005, he was, again, suspended for a doping offense, this time for 8 years, effectively ending his professional career. This suspension was later reduced to two years on appeal.
On June 6, 2007, Puerta returned to the professional circuit with a 6–4, 6–3 victory over Australian Joseph Sirianni at the Sassuolo Challenger, a tournament to which he was invited as a wild card since he had no ranking. "Puerta: Espero terminar el año entre los 100 mejores" , Clarín.com, 7 June 2007. In the second round, Puerta lost 6–3, 6–0 to Spaniard Marc López. Since returning to the tour, Puerta has only played on the ATP Challenger Tour, including winning the Bogotá Challenger in 2008 and reaching the final of the San Luis Potosí Challenger in 2008 without dropping a set, where he was forced to default the final, and the Cordenons challenger in 2007.
In December 2005, Puerta was banned again, this time after it was revealed that he had tested positive for the use of the cardiac stimulant etilefrine following his 2005 French Open final loss to Rafael Nadal. News of this positive drug test had been circulating since October 2005. The suspension was for eight years, the longest in tennis history at that time. As a result, Puerta was forced to forfeit all of his rankings points and prize money from the 2005 French Open onwards, and had all his 2005 results from after the French Open annulled. Puerta's finish as a finalist at the 2005 French Open was allowed to remain on the record books.
The International Tennis Federation tribunal noted, however, that "The amount of etilefrine detected in the positive drugs test was too small to have any effect on his performance". Puerta appealed against the ban, claiming on his web site that he only ingested trace amounts of it accidentally left over by his wife in a glass. On July 12, 2006, his suspension was reduced to two years by the Court of Arbitration for Sport, making him eligible to restart his career on June 5, 2007.
| 7–6(8–6), 3–6, 1–6, 5–7 |
| {class=wikitable style=font-size:97% !Legend (singles) |
| Grand Slam (0–1) |
| ATP World Tour Finals (0–0) |
| ATP Masters Series (0–0) |
| ATP International Series Gold (0–1) |
| ATP World Series (3–5) |
| Hard (0–0) |
| Clay (3–7) |
| Grass (0–0) |
| Outdoor (3–7) |
| Indoor (0–0) |
| Loss | 0–1 | San Marino Open, San Marino | World Series | Clay | Dominik Hrbatý | 2–6, 5–7 | |
| Win | 1–1 | Palermo, Italy | World Series | Clay | Franco Squillari | 6–3, 6–2 | |
| Loss | 1–2 | Mexican Open, Mexico | International Series Gold | Clay | Juan Ignacio Chela | 4–6, 6–7(4–7) | |
| Loss | 1–3 | Chile Open, Chile | World Series | Clay | Gustavo Kuerten | 6–7(3–7), 3–6 | |
| Win | 2–3 | Bancolombia Open | Bancolombia Open, Colombia | World Series | Clay | Younes El Aynaoui | 6–4, 7–6(7–5) |
| Loss | 2–4 | Swiss Open, Switzerland | World Series | Clay | Àlex Corretja | 1–6, 3–6 | |
| Loss | 2–5 | Croatia Open, Croatia | World Series | Clay | Marcelo Ríos | 6–7(1–7), 6–4, 3–6 | |
| Loss | 2–6 | Argentina Open, Argentina | International Series | Clay | Gastón Gaudio | 4–6, 4–6 | |
| Win | 3–6 | Casablanca, Morocco | International Series | Clay | Juan Mónaco | 6–4, 6–1 | |
| Loss | 3–7 | French Open, France | Grand Slam | Clay | Rafael Nadal | 7–6(8–6), 3–6, 1–6, 5–7 |
| {class=wikitable style=font-size:97% !Legend (doubles) |
| Grand Slam (0–0) |
| ATP World Tour Finals (0–0) |
| ATP Masters Series (0–0) |
| ATP International Series Gold (0–0) |
| ATP World Series (3–0) |
| Hard (0–0) |
| Clay (3–0) |
| Grass (0–0) |
| Outdoor (3–0) |
| Indoor (0–0) |
| Win | 1–0 | Bancolombia Open, Colombia | World Series | Clay | Diego del Río | Gábor Köves Eric Taino | 6–7, 6–3, 6–2 | |
| Win | 2–0 | Bavarian Championships, Germany | World Series | Clay | Daniel Orsanic | Massimo Bertolini Cristian Brandi | 7–6(7–3), 3–6, 7–6(7–3) | |
| Win | 3–0 | Croatia Open, Croatia | World Series | Clay | Javier Sánchez | Massimo Bertolini Cristian Brandi | 3–6, 6–2, 6–3 |
| {class=wikitable style=font-size:97% !Legend |
| ATP Challenger (10–8) |
| ITF Futures (1–0) |
| Hard (0–0) |
| Clay (11–8) |
| Grass (0–0) |
| Carpet (0–0) |
| Win | 1–0 | Quito Challenger, Ecuador | Challenger | Clay | Ramón Delgado | 6–1, 7–5 | |
| Win | 2–0 | Nice, France | Challenger | Clay | Arnaud Di Pasquale | 6–7, 6–4, 6–4 | |
| Loss | 2–1 | Espinho, Portugal | Challenger | Clay | Guillermo Cañas | 1–6, 6–2, 2–6 | |
| Loss | 2–2 | Zagreb Open, Croatia | Challenger | Clay | Jiří Novák | 5–7, 1–6 | |
| Loss | 2–3 | Sassuolo, Italy | Challenger | Clay | David Ferrer | 4–6, 1–6 | |
| Win | 3–3 | Mantua, Italy | Challenger | Clay | Potito Starace | 6–3, 1–0 ret. | |
| Win | 4–3 | Brindisi, Italy | Challenger | Clay | Leonardo Azzaro | 6–3, 7–6(7–2) | |
| Win | 5–3 | Aix En Provence, France | Challenger | Clay | Rafael Nadal | 3–6, 7–6(8–6), 6–4 | |
| Loss | 5–4 | Prostějov, Czech Republic | Challenger | Clay | Radek Štěpánek | 5–7, 3–6 | |
| Win | 6–4 | Samarkand, Uzbekistan | Challenger | Clay | Pavel Šnobel | 6–1, 6–2 | |
| Win | 7–4 | Tehran, Iran | Challenger | Clay | Melle van Gemerden | 6–3, 6–4 | |
| Win | 8–4 | Chile F2, Santiago | Futures | Clay | Diego Moyano | 6–1, 6–1 | |
| Win | 9–4 | Santa Cruz, Bolivia | Challenger | Clay | Franco Ferreiro | 6–7(5–7), 6–4, 6–3 | |
| Loss | 9–5 | Bogotá, Colombia | Challenger | Clay | Ramón Delgado | 4–6, 5–7 | |
| Win | 10–5 | Guadalajara, Mexico | Challenger | Clay | Nicolás Lapentti | 6–0, 6–2 | |
| Loss | 10–6 | La Serena, Chile | Challenger | Clay | Edgardo Massa | 4–6, 6–7(3–7) | |
| Loss | 10–7 | Cordenons, Italy | Challenger | Clay | Máximo González | 6–2, 5–7, 5–7 | |
| Loss | 10–8 | San Luis Potosí, Mexico | Challenger | Clay | Brian Dabul | walkover | |
| Win | 11–8 | Bogotá, Colombia | Challenger | Clay | Ricardo Hocevar | 7–6(7–2), 7–5 |
| {class=wikitable style=font-size:97% !Legend |
| ATP Challenger (5–5) |
| ITF Futures (0–0) |
| Hard (0–0) |
| Clay (5–5) |
| Grass (0–0) |
| Carpet (0–0) |
| Loss | 0–1 | Curitiba, Brazil | Challenger | Clay | Eduardo Medica | Glenn Weiner Herbert Wiltschnig | 3–6, 4–6 | |
| Win | 1–1 | Cali, Colombia | Challenger | Clay | Eduardo Medica | Bernardo Martínez Marco Osorio | 7–6, 7–5 | |
| Win | 2–1 | Geneva, Switzerland | Challenger | Clay | Diego del Río | Guillaume Marx Olivier Morel | 6–3, 6–4 | |
| Loss | 2–2 | Santiago, Chile | Challenger | Clay | Diego del Río | Lucas Arnold Ker Jaime Oncins | 2–6, 2–6 | |
| Loss | 2–3 | Guayaquil, Ecuador | Challenger | Clay | Diego del Río | Gábor Köves Tomas Nydahl | 6–2, 3–6, 6–7 | |
| Loss | 2–4 | Santiago, Chile | Challenger | Clay | Diego del Río | Sebastián Prieto Mariano Hood | 5–7, 1–6 | |
| Loss | 2–5 | Nice, France | Challenger | Clay | André Sá | Devin Bowen Mariano Hood | 5–7, 6–3, 4–6 | |
| Win | 3–5 | Zagreb Open, Croatia | Challenger | Clay | Julian Alonso | Eduardo Nicolás Espin Germán Puentes Alcañiz | 6–1, 6–4 | |
| Win | 4–5 | Biella, Italy | Challenger | Clay | Martín García | Simon Aspelin Fredrik Bergh | 6–2, 4–6, 6–4 | |
| Win | 5–5 | Sofia, Bulgaria | Challenger | Clay | Franco Ferreiro | Lazar Magdinchev Predrag Rusevski | 6–3, 1–6, 10–3 |
| 2–6, 3–6 |
| 6–7, 4–6 |
| Grand Slam tournaments | ||||||||||||||||||||||||
| Australian Open | A | 2R | 1R | A | A | 1R | A | A | A | A | A | A !0 / 3 !1–3 ! | ||||||||||||
| French Open | Q1 | 2R | 3R | 2R | 2R | 2R | A | F | A | A | A | A !0 / 6 !12–6 ! | ||||||||||||
| Wimbledon | 1R | A | A | 1R | A | 1R | A | A | A | A | A !0 / 3 !0–3 ! | |||||||||||||
| US Open | 1R | 2R | 1R | A | A | 1R | A | A | A | A | A !0 / 4 !1–4 ! | |||||||||||||
| Year-end championships | ||||||||||||||||||||||||
| ATP World Tour Finals | Did not qualify | Did not qualify !0 / 0 !0–0 ! | ||||||||||||||||||||||
| National representation | ||||||||||||||||||||||||
| Summer Olympics | Not Held | A | Not Held | A | Not Held | A | NH !0 / 0 !0–0 ! | |||||||||||||||||
| ATP Tour Masters 1000 | ||||||||||||||||||||||||
| Indian Wells Masters | A | 1R | A | A | A | A | A | A | A | A | A | A !0 / 1 !0–1 ! | ||||||||||||
| Miami Masters | A | 1R | A | 1R | A | A | A | A | A | A | A | A !0 / 2 !0–2 ! | ||||||||||||
| Monte-Carlo Masters | A | A | 2R | 1R | A | A | A | 3R | A | A | A | A !0 / 3 !3–3 ! | ||||||||||||
| Madrid Masters | Not Held | A | A | A | A | A | A | A !0 / 0 !0–0 ! | ||||||||||||||||
| Rome Masters | A | 1R | QF | 1R | A | A | A | A | A | A | A | A !0 / 3 !3–3 ! | ||||||||||||
| Hamburg Masters | A | 3R | 3R | 1R | A | A | A | 2R | A | A | A | NMS !0 / 3 !4–3 ! | ||||||||||||
| Canada Masters | A | A | 1R | A | A | A | A | A | A | A | A !0 / 1 !0–1 ! | |||||||||||||
| Cincinnati Masters | A | A | 2R | A | A | A | A | A | A | A | A !0 / 1 !1–1 ! | |||||||||||||
| Shanghai Masters | Not Held | NMS | Not Held | Not Masters Series | A !0 / 0 !0–0 ! | |||||||||||||||||||
| Paris Masters | A | A | 1R | A | A | A | A | A | A | A | A !0 / 1 !0–1 ! | |||||||||||||
| Career Statistics | ||||||||||||||||||||||||
| Grand Slam tournaments | ||||||||||||||||||||||||
| Australian Open | A | 1R | 1R | A | A | 1R | A | A !0 / 3 !0–3 ! | ||||||||||||||||
| French Open | 1R | 2R | A | A | A | A | A | 1R !0 / 3 !1–3 ! | ||||||||||||||||
| Wimbledon | A | A | A | A | A | A | A | |||||||||||||||||
| US Open | 1R | A | A | A | A | 1R | A | |||||||||||||||||
| ATP Tour Masters 1000 | ||||||||||||||||||||||||
| Miami Masters | A | 1R | A | A | A | A | A | A !0 / 1 !0–1 ! | ||||||||||||||||
| Monte-Carlo Masters | A | 1R | A | A | A | A | A | A !0 / 1 !0–1 ! | ||||||||||||||||
| Madrid Masters | Not Held | A | A | A | ||||||||||||||||||||
| Rome Masters | A | 1R | A | A | A | A | A | A !0 / 1 !0–1 ! | ||||||||||||||||
| Canada Masters | A | A | 2R | A | A | A | A | |||||||||||||||||
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