Hugo Dellien
Hugo Dellien Velasco is a Bolivian professional tennis player. He has a career-high ATP singles ranking of No. 64, achieved on 1 August 2022, becoming the highest-ranked Bolivian since Mario Martínez in November 1983. He is the current No. 1 Bolivian tennis player. He also has a career-high ATP doubles ranking of No. 185 achieved on 2 February 2015. In juniors, Dellien had a career-high combined ranking of No. 2 in March 2011.
Professional career
2019–2022: ATP, Major debuts and first wins, Olympics and top 65 debuts
He made his ATP debut at the 2019 Córdoba Open as a lucky loser. At the 2019 Rio Open, Dellien defeated Carlos Berlocq in qualifying competition, Guido Andreozzi in the first round, and Roberto Carballés Baena in the second to reach the quarterfinals recording his first ATP main draw wins. Hugo became the first Bolivian player with an ATP win since Martínez at the French Open in 1984, trailing 3–1 in both sets before performing a comeback against Andreozzi to secure a historic achievement for both him and his country.Ranked No. 128 at the 2021 Italian Open Dellien qualified for the main draw and recorded his second Masters win over world No. 36 Adrian Mannarino.
At the 2022 French Open he defeated Dominic Thiem to record his second Rolland Garros win. He reached a new career-high ranking of No. 64 on 1 August 2022 following the 2022 Wimbledon Championships.
2023: ATP semifinal, Struggling with form, out of top 150
He entered the 2023 Australian Open using protected ranking having not competed on the ATP Tour since July 2022. At the 2023 Córdoba Open, Argentina he reached again the quarterfinals as a qualifier defeating two Argentines, fifth seed Pedro Cachin and Guido Pella. Next he defeated 2021 champion Argentine Juan Manuel Cerundolo in three sets to reach his first ATP semifinal in his career. He became the first Bolivian tour-level semifinalist since Martínez in Washington in 1983.At the same tournament partnering in doubles with Pella, he lost to Nicolás Barrientos/Ariel Behar in a close match. Next he entered the 2023 Argentina Open using protected ranking.
At the 2023 Rio Open, also using a protected ranking, he reached the quarterfinals for a second time in four years at this tournament with a win over ninth seed Alex Molčan in the round of 16. As a result, he moved back into the top 100 at No. 96 on 27 February 2023.
In March, due to struggling with form, he dropped out of the top 100. In May 2023, he dropped further out of the top 150. He used protected ranking to enter the 2023 Italian Open and the 2023 Geneva Open. He also entered the main draw at the 2023 French Open and at the 2023 Wimbledon Championships using the same type of ranking.
2024-2025: Three Challengers, back to top 100, Masters third round
He won his eleventh Challenger title and first of the season at the 2024 Iași Open in Romania, defeating Javier Barranco Cosano and becoming the first brothers with Murkel to win a Challenger title in the same season since the Cerúndolos in 2022.He returned to the top 100 on 21 April 2025 at world No. 99. Ranked No. 103 at the Masters 1000, the 2025 Italian Open in Rome, Dellien replaced 26th seed Félix Auger-Aliassime directly into the second round, as a lucky loser, and defeated qualifier Thiago Seyboth Wild to reach a Masters third round for the first time in his career.
National representation
Dellien qualified to represent Bolivia at the 2020 Summer Olympics.Dellien has represented Bolivia at the Davis Cup with a W/L record of 26–10.
Personal life
His younger brother Murkel Dellien is also a professional tennis player who formerly played at Wichita State University. Their father, Hugo Eduardo Dellien, represented Beni Department as a substitute member of the Chamber of Deputies for the Social Democratic Power alliance from 2006 to 2010.Dellien owned an ice cream business alongside his father, Hugo Sr., purchased with some of his early career earnings.
Dellien is married to retired tennis player Liz Camila Giangreco Campiz; the couple share a daughter.
Performance timelines
Singles
Doubles
| Tournament | 2018 | 2019 | 2020 | 2021 | 2022 | SR | W–L | Win % |
| Australian Open | A | A | 1R | A | A | 0 / 1 | 0–1 | 0% |
| French Open | A | A | A | A | 1R | 0 / 1 | 0–1 | 0% |
| Wimbledon | Q1 | 1R | NH | A | 0 / 1 | 0–1 | 0% | |
| US Open | A | A | A | A | 0 / 0 | 0–0 | 0% | |
| Win–loss | 0–0 | 0–1 | 0–1 | 0–0 | 0–1 | 0 / 3 | 0–3 | 0% |
ATP Challenger and ITF Tour finals
Singles: 42 (29 titles, 13 runner-ups)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score | ||||||||||||||||
| Loss | 0–1 | Bolivia F2, Trinidad | Futures | Clay |  dts|Apr 2013Doubles: 37 (18 titles, 19 runner-ups)
|
