Hugo Dellien Velasco (; born 16 June 1993) is a Bolivian professional tennis player. He has a career-high ATP singles ranking of No. 64, achieved on 1 August 2022. 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
2019–2021: ATP, Major debuts and first wins, Olympics debut
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. Hugo became the first Bolivian player with an ATP win since Mario 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.
2022: Top 65 debut
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: First 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. 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, 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 registered for the 2023 French Open and the 2023 Wimbledon Championships using the same type of ranking.
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 tennis player who currently plays 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.
Grand Slam performance timelines
Singles
Current after the 2023 US Open.
Doubles
Challenger and Futures finals
Singles: 35 (25 titles, 10 runner-ups)
Doubles: 37 (18 titles, 19 runner-ups)
Davis Cup
Participations: (26–10)
indicates the outcome of the Davis Cup match followed by the score, date, place of event, the zonal classification and its phase, and the court surface.
Record against top 10 players
Dellien's match record against those who have been ranked in the top 10 is as follows (former #1 in bold):
Ernests Gulbis 1–0
Gilles Simon 1–0
Dominic Thiem 1–0
Janko Tipsarević 1–0
Novak Djokovic 0–1
Richard Gasquet 0–1
Karen Khachanov 0–1
Daniil Medvedev 0–1
Rafael Nadal 0–1
Kei Nishikori 0–1
Cameron Norrie 0–1
Fernando Verdasco 0–1
Stefanos Tsitsipas 0–1
Hubert Hurkacz 0–2
Casper Ruud 0–2
Alexander Zverev 0–2
*As of 24 May 2022.