Guido Pella (; born 17 May 1990) is an Argentine former professional tennis player. In August 2019, Pella reached his career best world No. 20 in singles. In July 2019, he peaked at No. 55 in doubles.
In February 2020, Pella announced via his Instagram account that he would be out indefinitely after being diagnosed with Morton's neuroma.
In July 2008 He won his first F3 event in Peru without dropping a set. In the following years, he won six further Futures titles, all of them on clay. His first Challenger final came at Guayaquil, Ecuador in November 2011, losing the match to Matteo Viola in straight sets. He finished the 2011 season ranked world no. 350 in singles and no. 501 in doubles.
In May, he entered the French Open qualifying draw, losing in the first round to former world no. 2 Tommy Haas. In August, he won his first hard-court tournament at the Manta Challenger, beating Maximiliano Estévez in the final.
In the US Open, he made it through the qualifying stage of the tournament, beating Lukáš Rosol to reach his first Grand Slam main-draw match, which he lost to Nikolay Davydenko in four sets. In September, he defeated Alex Bogomolov Jr. and Leonardo Kirche on his way to win the Campinas Challenger in Brazil.
He cracked the top 100 for the first time after winning the 2012 ATP Challenger Tour Finals, defeating Adrian Ungur in the final round. Pella finished the year ranked world no. 97 in singles and world no. 187 in doubles, a career high and a 249-spots improvement since the beginning of the season.
At the 2019 Mutua Madrid Open he reached the semifinals of a Masters 1000 for the first time, partnering João Sousa where they lost to Dominic Thiem and Diego Schwartzman. Following this successful run, he entered the top 100 in doubles at World No. 99 on 13 May 2019. Later in June, at the 2019 French Open he also reached the semifinals in doubles for the first time in his career partnering with Schwartzman this time where they were defeated by eventual champions German duo Kevin Krawietz and Andreas Mies. As a result, he reached a career-high of No. 56 in doubles on 10 June 2019.
At Wimbledon in July, he reached his first-ever Grand Slam singles quarterfinal by defeating former World Number 3 and 2016 Wimbledon finalist Milos Raonic in five sets from two sets down, but was then defeated by Roberto Bautista Agut. The victory marked his third against the most-recent runners-up of Wimbledon: He had previously defeated 2017 Wimbledon finalist Marin Čilić in the second round of 2018 Wimbledon, also from two sets down, and 2018 Wimbledon finalist Kevin Anderson in the third round of the 2019 championships. Following his successful runs at the Canada and Cincinnati Masters of third and second round respectively on his debut, he reached a career-high in singles of World No. 20 on 19 August 2019.
Seeded 22nd, Pella reached the third round at the 2020 Australian Open for the first time in his career where he lost to 12th seed Fabio Fognini. He announced an indefinite break due to health issues but returned to the tour after 6 months at the 2020 US Open.
At the 2021 Western & Southern Open Masters 1000 in Cincinnati he reached the third round by defeating 15th seed David Goffin, and took his revenge for the loss at the Australian Open in 2020 by defeating Fabio Fognini in the second round.
He entered the Italian Open using protected ranking and reached the second round defeating Maxime Cressy. He moved another 60 positions up in the top 450. At the 2023 French Open he also reached the second round defeating Quentin Halys in five sets with a super tiebreak in the fifth, coming back from two sets to one down, and moved another 95 positions up in the top 350 in the rankings. At the 2023 Wimbledon Championships he defeated 13th seed Borna Ćorić and qualifier Harold Mayot to reach the third round.
On 16 September 2023, Pella announced his retirement from professional tennis.
| Grand Slam tournaments | |||||||||||||||
| Australian Open | A | 1R | A | A | 2R | 1R | 1R | 1R | 3R | 1R | A | 1R | 0 / 8 | 3–8 | |
| French Open | Q1 | 2R | Q2 | Q2 | 2R | 1R | 2R | 2R | 2R | 2R | A | 2R | 0 / 8 | 7–8 | |
| Wimbledon | A | 1R | A | Q3 | 1R | A | 3R | QF | NH | 1R | A | 3R | 0 / 6 | 8–6 | 57% |
| US Open | 1R | 1R | Q1 | 1R | 2R | 2R | 3R | 1R | 1R | 2R | A | 1R | 0 / 10 | 5–10 | 33% |
| Win–loss | 0–1 | 1–4 | 0–0 | 0–1 | 3–4 | 1–3 | 5–4 | 5–4 | 3–3 | 2–4 | 0–0 | 3–4 | 0 / 32 | 23–32 | |
| ATP Masters 1000 tournaments | |||||||||||||||
| Indian Wells Masters | A | 1R | Q2 | A | 3R | 2R | 1R | 3R | NH | 2R | A | 2R | 0 / 6 | 7–7 | |
| Miami Open | A | 2R | 1R | A | 1R | 3R | 1R | 2R | NH | A | A | 2R | 0 / 7 | 4–7 | |
| Monte-Carlo Masters | A | A | A | A | 1R | A | 1R | QF | NH | 1R | A | A | 0 / 4 | 2–4 | |
| Madrid Open | A | A | A | A | 1R | A | A | 2R | NH | 1R | A | A | 0 / 3 | 1–3 | |
| Italian Open | A | A | A | A | 1R | A | A | 1R | 1R | A | A | 2R | 0 / 4 | 1–4 | |
| Canadian Open | A | A | A | A | A | A | A | 3R | NH | A | A | A | 0 / 1 | 2–1 | |
| Cincinnati Masters | A | A | A | A | A | A | A | 2R | A | 3R | A | A | 0 / 2 | 3–2 | |
| Shanghai Masters | A | A | A | A | 1R | A | A | 1R | NH | A | 0 / 2 | 0–2 | |||
| Paris Masters | A | A | A | A | 1R | Q1 | Q1 | A | A | A | A | A | 0 / 1 | 0–1 | |
| Win–loss | 0–0 | 1–2 | 0–1 | 0–0 | 2–7 | 3–2 | 0–3 | 8–8 | 0–0 | 3–4 | 0–0 | 3–3 | 0 / 30 | 20–30 | |
| Career statistics | |||||||||||||||
| Tournaments | 1 | 13 | 4 | 4 | 22 | 15 | 22 | 26 | 8 | 18 | 0 | 13 | Career total: 146 | ||
| Titles | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | Career total: 1 | ||
| Finals | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 0 | 0 | 0 | 0 | Career total: 5 | ||
| Overall win–loss | 0–1 | 7–13 | 3–4 | 1–4 | 16–23 | 16–18 | 25–22 | 36–25 | 7–10 | 8–18 | 0–0 | 9–13 | 1 / 146 | 128–151 | |
| Year-end ranking | 97 | 118 | 155 | 74 | 80 | 64 | 58 | 25 | 43 | 74 | – | – | $6,368,373 | ||
| Grand Slam tournaments | |||||||||||
| Australian Open | 1R | 1R | 1R | 1R | 2R | 1R | A | 1R | 0 / 7 | 1–7 | |
| French Open | 1R | A | 2R | SF | 2R | 2R | A | 1R | 0 / 6 | 7–6 | |
| Wimbledon | 1R | A | A | 1R | NH | A | A | 1R | 0 / 3 | 0–3 | 0% |
| US Open | 1R | 1R | 1R | 1R | A | A | A | 1R | 0 / 5 | 0–5 | 0% |
| Win–loss | 0–4 | 0–2 | 1–3 | 4–4 | 2–2 | 1–2 | 0–0 | 0–4 | 0 / 21 | 8–21 | |
| ATP Masters 1000 tournaments | |||||||||||
| Indian Wells Masters | 2R | A | A | 1R | NH | A | A | 0 / 2 | 1–2 | 33% | |
| Miami Open | A | A | A | 2R | NH | A | A | 0 / 1 | 1–1 | 50% | |
| Monte-Carlo Masters | A | A | A | 2R | NH | QF | A | 0 / 2 | 3–2 | 60% | |
| Madrid Open | 1R | A | A | SF | NH | A | A | 0 / 2 | 3–2 | 60% | |
| Italian Open | A | A | A | 2R | 1R | A | A | 0 / 2 | 1–2 | 33% | |
| Canadian Open | A | A | A | 1R | NH | A | A | 0 / 1 | 0–1 | 0% | |
| Cincinnati Masters | A | A | A | 1R | A | A | A | 0 / 1 | 0–1 | 0% | |
| Shanghai Masters | A | A | A | 1R | NH | 0 / 1 | 0–1 | 0% | |||
| Paris Masters | A | A | A | A | A | A | A | 0 / 0 | 0–0 | 0% | |
| Win–loss | 1–2 | 0–0 | 0–0 | 6–8 | 0–1 | 2–1 | 0–0 | 2–6 | 0 / 18 | 11–18 | 43% |
| {class="wikitable" style=font-size:90% !Legend |
| Grand Slam (0-0) |
| ATP Finals (0-0) |
| ATP Masters 1000 (0-0) |
| ATP 500 Series (0–1) |
| ATP 250 Series (1–3) |
| Hard (0–0) |
| Clay (1–4) |
| Grass (0–0) |
| Outdoor (0–4) |
| Indoor (1–0) |
| Loss | 0–1 | Rio Open, Brazil | 500 Series | Clay | Pablo Cuevas | 4–6, 7–6(7–5), 4–6 | |
| Loss | 0–2 | Bavarian Championships, Germany | 250 Series | Clay | Alexander Zverev | 4–6, 3–6 | |
| Loss | 0–3 | Croatia Open Umag, Croatia | 250 Series | Clay | Marco Cecchinato | 2–6, 6–7(4–7) | |
| Loss | 0–4 | Córdoba Open, Argentina | 250 Series | Clay | Juan Ignacio Londero | 6–3, 5–7, 1–6 | |
| Win | 1–4 | Brasil Open, Brazil | 250 Series | Clay (i) | Cristian Garín | 7–5, 6–3 |
| Win | Davis Cup, Zagreb, Croatia | Hard (i) | Juan Martín del Potro Federico Delbonis Leonardo Mayer | Marin Čilić Ivo Karlović Ivan Dodig Franko Škugor | 3–2 |
| {class=wikitable style=font-size:90% !Legend |
| ATP Challenger (13–2) |
| ITF Futures (7–4) |
| Hard (3–0) |
| Clay (17–6) |
| Grass (0–0) |
| Carpet (0–0) |
| Loss | 0–1 | ITF Lima, Peru F2 | Futures | Clay | Matias Silva | 6–7(6), 6–1, 4–6 | |
| Loss | 0–2 | ITF La Paz, Bolivia F3 | Futures | Clay | Guillermo Carry | 5–7, 3–6 | |
| Win | 1–2 | ITF Trujillo, Peru F3 | Futures | Clay | Juan-Manuel Valverde | 6–0, 6–4 | |
| Loss | 1–3 | ITF Bahia Bianca, Argentina F15 | Futures | Clay | Marco Trungelliti | 1–6, 2–6 | |
| Win | 2–3 | ITF Jujuy, Argentina F1 | Futures | Clay | Guillermo Rivera Aránguiz | 6–3, 6–4 | |
| Loss | 2–4 | ITF Córdoba, Argentina F4 | Futures | Clay | Juan-Manuel Valverde | 3–6, 6–2, 3–6 | |
| Win | 3–4 | ITF Santa Cruz, Bolivia F1 | Futures | Clay | Gaston Giussani | 4–6, 6–2, 6–2 | |
| Win | 4–4 | ITF Cochabamba, Bolivia F2 | Futures | Clay | Arnau Brugués Davi | 6–2, 6–7(3), 7–6(5) | |
| Win | 5–4 | ITF Corrientes, Argentina F25 | Futures | Clay | Lionel Noviski | 6–3, 6–0 | |
| Win | 6–4 | ITF Corrientes, Argentina F13 | Futures | Clay | Marco Trungelliti | 3–6, 6–1, 6–2 | |
| Win | 7–4 | ITF Cochabamba, Bolivia F2 | Futures | Clay | Juan Ignacio Londero | 6–4, 6–3 | |
| Loss | 7–5 | Challenger Ciudad de Guayaquil, Ecuador | Challenger | Clay | Matteo Viola | 4–6, 1–6 | |
| Win | 8–5 | Challenger de Salinas Diario Expreso, Ecuador | Challenger | Hard | Paolo Lorenzi | 1–6, 7–5, 6–3 | |
| Win | 9–5 | Manta Open, Ecuador | Challenger | Hard | Maximiliano Estévez | 6–4, 7–5 | |
| Win | 10–5 | Campeonato Internacional de Campinas, Brazil | Challenger | Clay | Leonardo Kirche | 6–4, 6–0 | |
| Win | 11–5 | ATP Challenger Finals, Brazil | Challenger | Hard | Adrian Ungur | 6–3, 6–7(4), 7–6(4) | |
| Win | 12–5 | IS Open São Paulo, Brazil | Challenger | Clay | Facundo Argüello | 6–1, 6–0 | |
| Win | 13–5 | Lima Challenger, Peru | Challenger | Clay | Jason Kubler | 6–2, 6–4 | |
| Win | 14–5 | San Luis Open Challenger Tour, Mexico | Challenger | Clay | James McGee | 6–3, 6–3 | |
| Win | 15–5 | São Paulo Challenger, Brazil | Challenger | Clay | Christian Lindell | 7–5, 7–6(1) | |
| Loss | 15–6 | Heilbronn Neckarcup, Germany | Challenger | Clay | Alexander Zverev | 1–6, 6–7(7) | |
| Win | 16–6 | Aberto do Rio Grande do Sul, Brazil | Challenger | Clay | Diego Schwartzman | 6–3, 7–6(5) | |
| Win | 17–6 | Uruguay Open, Uruguay | Challenger | Clay | Íñigo Cervantes | 7–5, 2–6, 6–4 | |
| Win | 18–6 | Aspria Cup Milan, Italy | Challenger | Clay | Federico Delbonis | 6–2, 2–1 ret. | |
| Win | 19–6 | Claro Open Floridablanca, Colombia | Challenger | Clay | Facundo Argüello | 6–2, 6–4 | |
| Win | 20–6 | Montevideo Open, Uruguay (2) | Challenger | Clay | Carlos Berlocq | 6–3, 3–6, 6–1 |
| {class=wikitable style=font-size:90% !Legend |
| ATP Challenger (6–5) |
| ITF Futures (8–5) |
| Hard (0–0) |
| Clay (14–10) |
| Grass (0–0) |
| Carpet (0–0) |
| Loss | 0–1 | ITF Trujillo, Peru F3 | Futures | Clay | Sergio Galdós | Matias Silva Mauricio Echazú | 6–2, 1–6, 7–10 | |
| Win | 1–1 | ITF Buenos Aires, Argentina F14 | Futures | Clay | Andrés Molteni | Alejandro Kon Gonzalo Tur | 4–6, 6–3, 10–8 | |
| Win | 2–1 | ITF Neuquén, Argentina F16 | Futures | Clay | Andrés Molteni | Guillermo Bujniewicz N Jara-Lozano | 6–3, 5–7, 14–12 | |
| Win | 3–1 | ITF Tucumán, Argentina F17 | Futures | Clay | Andrés Molteni | Diego Cristin G-A Grimolizzi | 6–7(6), 7–6(13), 10–6 | |
| Loss | 3–2 | ITF Jujuy, Argentina F1 | Futures | Clay | Andrés Molteni | Diego Cristin J-P Amado | 5–7, 6–7(7) | |
| Win | 4–2 | ITF Córdoba, Argentina F3 | Futures | Clay | Andrés Molteni | German Gaich Guillermo Durán | 6–2, 6–4 | |
| Win | 5–2 | ITF Santa Cruz, Bolivia F1 | Futures | Clay | Diego Cristin | J-J Monteferrario Gaston Giussani | 6–1, 6–1 | |
| Win | 6–2 | ITF Corrientes, Argentina F25 | Futures | Clay | Andrés Molteni | Jonathan Gonzalia Alejandro Fabbri | 6–1, 6–3 | |
| Loss | 6–3 | ITF Rosario, Argentina F22 | Futures | Clay | Andrés Molteni | Diego Cristin Pablo Galdón | 3–6, 6–2, 7–10 | |
| Loss | 6–4 | Challenger de Buenos Aires, Argentina | Challenger | Clay | Andrés Molteni | Carlos Berlocq Brian Dabul | 6–7(4), 3–6 | |
| Loss | 6–5 | ITF Arequipa, Perj F1 | Futures | Clay | Martín Cuevas | Duilio Beretta Sergio Galdós | 4–6, 0–6 | |
| Win | 7–5 | ITF Cochabamba, Bolivia F2 | Futures | Clay | Sergio Galdós | Mauricio Doria-Medina Federico Zeballos | 6–3, 6–2 | |
| Win | 8–5 | ITF Santa Cruz, Bolivia F3 | Futures | Clay | Sergio Galdós | Felipe Soares Thales Turini | 3–6, 6–2, 10–8 | |
| Loss | 8–6 | ITF Sucre, Bolivia F4 | Futures | Clay | Sergio Galdós | J-J Monteferrario Guillermo Carry | 6–7(3), 4–6 | |
| Win | 9–6 | Seguros Bolívar Open Pereira, Colombia | Challenger | Clay | Martín Alund | Sebastián Decoud Rubén Ramírez Hidalgo | 6–3, 2–6, 10–5 | |
| Loss | 9–7 | IS Open S ã | Challenger | Clay | Sergio Galdós | Artem Sitak Roman Borvanov | 4–6, 6–7(3) | |
| Win | 10–7 | São Paulo Challenger, Brazil | Challenger | Clay | Diego Schwartzman | Máximo González Andrés Molteni | 1–6, 6–3, 10–4 | |
| Loss | 10–8 | Seguros Bolívar Open Pereira, Colombia | Challenger | Clay | Horacio Zeballos | Nicolás Barrientos Eduardo Struvay | 6–3, 3–6, 9–11 | |
| Win | 11–8 | Challenger Ciudad de Guayaquil, Ecuador | Challenger | Clay | Máximo González | Pere Riba Jordi Samper Montaña | 2–6, 7–6(3), 10–5 | |
| Win | 12–8 | Lima Challenger, Peru | Challenger | Clay | Sergio Galdós | Roberto Maytín Marcelo Demoliner | 6–3, 6–1 | |
| Win | 13–8 | Challenger Cachantún Cup, Chile | Challenger | Clay | Andrés Molteni | Máximo González Andrea Collarini | 7–6(7), 3–6, 10–4 | |
| Loss | 13–9 | San Luis Open Challenger Tour, Mexico | Challenger | Clay | Sergio Galdós | Horacio Zeballos Guillermo Durán | 6–7(4), 4–6 | |
| Loss | 13–10 | Campeonato Internacional de Santos, Brazil | Challenger | Clay | Andrés Molteni | Máximo González Roberto Maytín | 4–6, 6–7(4) | |
| Win | 14–10 | Vicenza Internazionali, Italy | Challenger | Clay | Facundo Bagnis | Salvatore Caruso Federico Gaio | 6–2, 6–4 |
| 4 |
| 2013 | |||||||
| 1. | Janko Tipsarević | 10 | Horse Cup Düsseldorf, Germany | Clay | 2R | 7–6(1), 6–1 | 101 |
| 2017 | |||||||
| 2. | Dominic Thiem | 7 | Chengdu Open, China | Hard | 2R | 7–6(6), 6–4 | 72 |
| 2018 | |||||||
| 3. | Marin Čilić | 5 | Wimbledon, United Kingdom | Grass | 2R | 3–6, 1–6, 6–4, 7–6(3), 7–5 | 82 |
| 2019 | |||||||
| 4. | Kevin Anderson | 8 | Wimbledon, United Kingdom | Grass | 3R | 6–4, 6–3, 7–6(4) | 26 |
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