Hugo Dellien Velasco (Spanish pronunciation: [ˈuɣo ðeˈljen];^[a][1][2][3] 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.^[4] 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.

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.^[5]

At the 2022 French Open he defeated Dominic Thiem to record his second Rolland Garros win.^[6] He reached a new career-high ranking of No. 64 on 1 August 2022 following the 2022 Wimbledon Championships.

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^[7] and Guido Pella.^[8] 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.^[9] 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.

He won his tenth Challenger title and first of the season at the 2024 Iași Open in Romania, with a win over Javier Barranco Cosano becoming the first brothers with Murkel to win a Challenger title in the same season since the Cerúndolos in 2022. ^[10]

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.

His younger brother Murkel Dellien is also a tennis player who currently plays at Wichita State University.^[11] Their father, Hugo Eduardo Dellien,^[12] represented Beni Department as a substitute member of the Chamber of Deputies for the Social Democratic Power alliance from 2006 to 2010.^[13]

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.^[14]

Current after the 2023 US Open.

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Sep 2012	Bolivia F2, Trinidad	Futures	Clay	Juan-Pablo Amado	2–6, 1–6
Win	1–1	Apr 2013	Chile F1, Santiago	Futures	Clay	Gonzalo Lama	6–4, 6–7(6–8), 7–6(7–2)
Win	2–1	Apr 2013	Argentina F3, Villa del Dique	Futures	Clay	Gabriel Alejandro Hidalgo	7–6(7–3), 2–6, 6–3
Win	3–1	Jul 2013	France F13, Saint-Gervais	Futures	Clay	Johan Sébastien Tatlot	6–4, 5–7, 6–3
Loss	3–2	Sep 2013	Bolivia F3, Cochabamba	Futures	Clay	Chase Buchanan	2–6, 3–6
Win	4–2	Oct 2013	Bolivia F4, La Paz	Futures	Clay	Chase Buchanan	7–6(7–3), 2–6, 6–4
Win	5–2	Oct 2013	Bolivia F5, Santa Cruz	Futures	Clay	Ryusei Makiguchi	6–1, 6–1
Loss	5–3	May 2014	Morocco F1, Safi	Futures	Clay	Gianluigi Quinzi	2–6, 2–6
Win	6–3	Oct 2014	Bolivia F3, Santa Cruz	Futures	Clay	Christopher Díaz Figueroa	6–3, 6–4
Loss	6–4	Nov 2014	Montevideo, Uruguay	Challenger	Clay	Pablo Cuevas	2–6, 4–6
Loss	6–5	Dec 2014	Dominican R. F3, Santo Domingo	Futures	Clay	Fabiano de Paula	6–7(4–7), 2–6
Win	7–5	Aug 2015	Germany F10, Wetzlar	Futures	Clay	Jan Choinski	6–3, 6–3
Win	8–5	Aug 2016	Austria F6, Vogau	Futures	Clay	Omar Giacalone	6–4, 2–6, 6–2
Win	9–5	Jan 2017	USA F5, Weston	Futures	Clay	Dominik Köpfer	6–2, 7–5
Loss	9–6	Jul 2018	Sweden F1, Karlskrona	Futures	Clay	Jan Choinski	5–7, 6–4, 2–6
Win	10–6	Jul 2018	Sweden F2, Båstad	Futures	Clay	Yannick Vandenbulcke	6–4, 5–7, 6–2
Win	11–6	Jun 2017	Turkey F22, Istanbul	Futures	Clay	Mario Vilella Martínez	6–2, 1–6, 6–2
Win	12–6	Jun 2017	Turkey F23, Istanbul	Futures	Clay	Antoine Hoang	6–3, 6–2
Win	13–6	Aug 2017	Romania F9, Bucharest	Futures	Clay	Dragoș Dima	6–2, 6–4
Win	14–6	Sep 2017	Bolivia F2, Cochabamba	Futures	Clay	Felipe Mantilla	6–4, 6–2
Win	15–6	Oct 2017	Bolivia F3, Santa Cruz	Futures	Clay	Juan Carlos Sáez	6–4, 6–2
Win	16–6	Mar 2018	Italy F3, Santa Margherita di Pula	Futures	Clay	Martín Cuevas	6–4, 7–6(7–3)
Win	17–6	Apr 2018	Sarasota, USA	Challenger	Clay	Facundo Bagnis	2–6, 6–4, 6–2
Win	18–6	May 2018	Savannah, USA	Challenger	Clay	Christian Harrison	6–1, 1–6, 6–4
Win	19–6	Jun 2018	Vicenza, Italy	Challenger	Clay	Matteo Donati	6–4, 5–7, 6–4
Loss	19–7	Jul 2018	Marburg, Germany	Challenger	Clay	Juan Ignacio Londero	6–3, 5–7, 4–6
Win	20–7	Mar 2019	Santiago, Chile	Challenger	Clay	Wu Tung-lin	5–7, 7–6(7–1), 6–1
Win	21–7	Jun 2019	Milan, Italy	Challenger	Clay	Danilo Petrović	7–5, 6–4
Loss	21–8	Nov 2019	Guayaquil, Ecuador	Challenger	Clay	Thiago Seyboth Wild	4–6, 0–6
Win	22–8	Oct 2021	Lima, Peru	Challenger	Clay	Camilo Ugo Carabelli	6–3, 7–5
Win	23–8	Nov 2021	Montevideo, Uruguay	Challenger	Clay	Juan Ignacio Londero	6–0, 6–1
Loss	23–9	Dec 2021	Florianópolis, Brazil	Challenger	Clay	Igor Marcondes	2–6, 4–6
Win	24–9	Mar 2022	Santiago, Chile	Challenger	Clay	Alejandro Tabilo	6–3, 4–6, 6–4
Loss	24–10	Mar 2022	Concepción, Chile	Challenger	Clay	Tomás Martín Etcheverry	3–6, 2–6
Win	25–10	Mar 2023	Santiago, Chile	Challenger	Clay	Thiago Seyboth Wild	3–6, 6–3, 6–3
Loss	25–11	Aug 2023	Lüdenscheid, Germany	Challenger	Clay	Duje Ajdukovic	5–7, 4–6
Win	26–11	Oct 2023	Curitiba, Brazil	Challenger	Clay	Oliver Crawford	7–6(8–6), 4–6, 7–6(7–1)
Win	27–11	Jul 2024	Iași, Romania	Challenger	Clay	Javier Barranco Cosano	6–1, 6–1
Win	28–11	Aug 2024	Liberec, Czech Republic	Challenger	Clay	Elmer Møller	5–7, 6–4, 6–1

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Sep 2010	Bolivia F2, La Paz	Futures	Clay	Federico Zeballos	Francisco Carbajal Christopher Díaz Figueroa	2–6, 3–6
Win	1–1	Oct 2010	Bolivia F4, Santa Cruz	Futures	Clay	Federico Zeballos	Mauricio Echazú Sergio Galdós	6–1, 6–4
Win	2–1	Sep 2011	Bolivia F1, La Paz	Futures	Clay	Boris Arias	Juan Ignacio Londero Rodrigo Scattareggia	3–6, 7–6(7–3), [10–7]
Loss	2–2	Nov 2011	Chile F14, Villa Alemana	Futures	Clay	Juan Vázquez-Valenzuela	Juan-Pablo Amado Matías Salinas	6–7(1–7), 5–7
Loss	2–3	Mar 2012	Portugal F2, Faro	Futures	Hard	Federico Zeballos	Andrej Martin Adrian Sikora	1–6, 2–6
Win	3–3	Aug 2012	Argentina F21, Rosario	Futures	Clay	Ryusei Makiguchi	Guillermo Bujniewicz Fabricio Burdisso	6–4, 1–6, [10–7]
Win	4–3	Sep 2012	Argentina F22, Santiago del Estero	Futures	Clay	Mateo Nicolás Martínez	Federico Coria Valentin Florez	6–7(7–9), 6–1, [10–6]
Win	5–3	Sep 2012	Bolivia F1, Cochabamba	Futures	Clay	Mauricio Doria-Medina	Juan-Pablo Amado Ryusei Makiguchi	3–6, 6–3, [10–7]
Loss	5–4	Sep 2012	Bolivia F2, Trinidad	Futures	Clay	Murkel Dellien	Facundo Mena Sebastián Serrano	3–6, 5–7
Loss	5–5	Oct 2012	Bolivia F5, Santa Cruz	Futures	Clay	Mauricio Doria-Medina	Mauricio Echazú Sergio Galdós	3–6, 3–6
Loss	5–6	Mar 2013	Croatia F4, Poreč	Futures	Clay	Felipe Ríos	Alberto Brizzi Daniele Giorgini	6–1, 5–7, [7–10]
Win	6–6	Jul 2013	France F13, Saint-Gervais	Futures	Clay	Federico Zeballos	Kevin Botti Simon Cauvard	6–4, 2–6, [11–9]
Loss	6–7	Sep 2013	Bolivia F3, Cochabamba	Futures	Clay	Murkel Dellien	Franco Feitt José Maria Páez	3–6, 3–6
Loss	6–8	Mar 2014	Salinas, Ecuador	Challenger	Clay	Eduardo Schwank	Roberto Maytín Fernando Romboli	3–6, 4–6
Win	7–8	Mar 2014	Argentina F4, Marcos Juárez	Futures	Clay	Maximiliano Estévez	Juan Ignacio Londero Andrés Molteni	6–3, 6–4
Win	8–8	Mar 2014	Argentina F5, Rosario	Futures	Clay	Facundo Mena	Leonardo Kirche André Miele	6–4, 0–6, [10–5]
Loss	8–9	Mar 2014	Argentina F6, Olavarría	Futures	Clay	Maximiliano Estévez	Dante Gennaro Ryusei Makiguchi	2–6, 3–6
Win	9–9	May 2014	Morocco F1, Safi	Futures	Clay	Leandro Portmann	Talal Ouahabi Taha Tifnouti	6–1, 7–6(14–12)
Loss	9–10	Jul 2014	San Benedetto, Italy	Challenger	Clay	Sergio Galdós	Daniele Giorgini Potito Starace	3–6, 7–6(7–3), [5–10]
Loss	9–11	Aug 2014	Ecuador F4, Quito	Futures	Clay	Federico Zeballos	Mauricio Echazú Guillermo Rivera Aránguiz	3–6, 4–6
Loss	9–12	Oct 2014	Córdoba, Argentina	Challenger	Clay	Juan Ignacio Londero	Marcelo Demoliner Nicolás Jarry	3–6, 5–7
Win	10–12	Dec 2014	Dominican R. F2, Santiago	Futures	Clay	Duilio Beretta	Fabiano de Paula Thiago Monteiro	3–6, 6–4, [10–8]
Win	11–12	Dec 2014	Dominican R. F3, Santo Domingo	Futures	Clay	Duilio Beretta	Emilio Gómez Manuel Sánchez	6–7(9–11), 6–4, [10–4]
Loss	11–13	Jun 2016	Turkey F25, Marmaris	Futures	Clay	Federico Zeballos	Tuna Altuna Cem İlkel	5–7, 3–6
Win	12–13	Aug 2016	Austria F6, Vogau	Futures	Clay	Federico Zeballos	Lenny Hampel Sebastian Ofner	7–5, 6–4
Win	13–13	Aug 2016	Austria F7, Pörtschach	Futures	Clay	Federico Zeballos	Péter Nagy Nik Razboršek	6–3, 6–0
Loss	13–14	Nov 2016	Bolivia F1, La Paz	Futures	Clay	Federico Zeballos	Mauricio Echazú Jorge Brian Panta	2–6, 6–7(3–7)
Win	14–14	Nov 2016	Bolivia F3, Santa Cruz	Futures	Clay	Federico Zeballos	Franco Emanuel Egea Alejandro Tabilo	6–4, 6–4
Loss	14–15	May 2017	Turkey F20, Antalya	Futures	Clay	Julius Tverijonas	Sergio Martos Gornés David Pérez Sanz	5–7, 4–6
Win	15–15	Jun 2017	Turkey F22, Istanbul	Futures	Clay	Federico Zeballos	Sarp Ağabigün Altuğ Çelikbilek	6–4, 4–6, [10–3]
Loss	15–16	Jun 2017	Turkey F23, Istanbul	Futures	Clay	Federico Zeballos	Bradley Mousley Mario Vilella Martínez	3–6, 3–6
Loss	15–17	Aug 2017	Romania F9, Bucharest	Futures	Clay	Federico Zeballos	Adrian Barbu Florin Mergea	2–6, 6–4, [11–13]
Win	16–17	Sep 2017	Bolivia F2, Cochabamba	Futures	Clay	Boris Arias	Christopher Díaz Figueroa Federico Zeballos	6–3, 6–3
Loss	16–18	Nov 2017	Guayaquil, Ecuador	Challenger	Clay	Federico Zeballos	Marcelo Arévalo Miguel Reyes-Varela	1–6, 7–6(9–7), [6–10]
Win	17–18	Mar 2018	Italy F3, Pula	Futures	Clay	Martín Cuevas	Gianluca Di Nicola Walter Trusendi	7–6(7–3), 7–5
Win	18–18	Oct 2018	Campinas, Brazil	Challenger	Clay	Guillermo Durán	Franco Agamenone Fernando Romboli	7–5, 6–4
Loss	18–19	Sep 2019	Buenos Aires, Argentina	Challenger	Clay	Federico Zeballos	Guido Andreozzi Guillermo Durán	7–6(7–3), 2–6, [1–10]

• 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.

Rubber outcome	No.	Rubber	Match type (partner if any)	Opponent nation	Opponent player(s)	Score
1–4; 9–11 July 2010; Javier Luizaga, Cochabamba, Bolivia; Americas relegation play-off; clay surface
Victory	1	V	Singles	El Salvador	Sebastián Moreno	6–1, 7–5
3–0; 17 June 2011; Club de Tenis Santa Cruz, Santa Cruz, Bolivia; Americas round robin; clay surface
Victory	2	III	Doubles (with Boris Arias)	Aruba	Mitchell de Jong / Gian Hodgson	6–2, 6–3
2–1; 18 June 2011; Club de Tenis Santa Cruz, Santa Cruz, Bolivia; Americas promotion pool; clay surface
Victory	3	I	Singles	Guatemala	Julen Urigüen	6–4, 6–7(3–7), 6–3
3–0; 19 June 2011; Club de Tenis Santa Cruz, Santa Cruz, Bolivia; Americas promotion pool; clay surface
Victory	4	I	Singles	Costa Rica	Pablo Núñez	6–1, 6–1
1–4; 10–12 February 2012; Federación Dominicana de Tenis, Santo Domingo, Dominican Republic; Americas first round; hard surface
Defeat	5	I	Singles	Dominican Republic	Víctor Estrella Burgos	0–6, 2–6, 7–6(7–5), 0–6
Defeat	6	III	Doubles (with Mauricio Doria-Medina)		Víctor Estrella Burgos / José Hernández-Fernández	6–3, 2–6, 5–7, 3–6
1–3; 6–8 April 2012; Palmas Del Mar Tennis Club, Humacao, Puerto Rico; Americas relegation play-off; hard surface
Victory	7	II	Singles	Puerto Rico	Ricardo González-Díaz	6–2, 6–2, 3–6, 7–6(7–1)
Defeat	8	IV	Singles		Alex Llompart	3–6, 5–7, 6–4, 0–6
3–0; 17 June 2013; Club de Tenis La Paz, La Paz, Bolivia; Americas round robin; clay surface
Victory	9	II	Singles	Jamaica	Dominic Pagon	6–4, 6–1
Victory	10	III	Doubles (with Boris Arias)		Atton Burrell / Davian Burrell	6–1, 6–2
3–0; 19 June 2013; Club de Tenis La Paz, La Paz, Bolivia; Americas round robin; clay surface
Victory	11	II	Singles	Paraguay	José Benítez	1–6, 6–3, 6–1
3–0; 21 June 2013; Club de Tenis La Paz, La Paz, Bolivia; Americas round robin; clay surface
Victory	12	II	Singles	Cuba	William Dorantes Sanchez	6–1, 6–3
2–0; 22 June 2013; Club de Tenis La Paz, La Paz, Bolivia; Americas Promotion Play off; clay surface
Victory	13	II	Singles	Costa Rica	Alan Reifer	6–4, 6–3
2–3; 31 January – 2 February 2014; Club de Tenis Trinidad, Trinidad, Bolivia; Americas first round; clay surface
Victory	14	II	Singles	Peru	Sergio Galdós	6–3, 6–4, 2–6, 6–4
Victory	15	III	Doubles (with Federico Zeballos)		Duilio Beretta / Sergio Galdós	7–6(7–4), 7–5, 6–4
Defeat	16	IV	Singles		Mauricio Echazú	6–7(4–7), 2–6, 2–6
3–1; 4-6 April 2014; Country Club Cochabamba, Cochabamba, Bolivia; Americas relegation play-off; clay surface
Victory	17	II	Singles	Guatemala	Andrés Bucaro	6–2, 6–3, 7–5
Victory	18	III	Doubles (with Federico Zeballos)		Andrés Bucaro / Christopher Díaz Figueroa	7–6(7–3), 7–5, 6–4
Victory	19	IV	Singles		Christopher Díaz Figueroa	6–3, 3–6, 6–2, 4–6, 6–2
1–3; 6-8 March 2015; Cancha Estadio Lorenzo Molina Casares, Mérida, Mexico; Americas first round; hard surface
Victory	20	II	Singles	Mexico	Tigre Hank	7–6(7–2), 2–6, 6–4, 6–1
Defeat	21	IV	Singles		Daniel Garza	3–6, 2–6, 6–3, 3–6
2–3; 17-19 July 2015; Terrazas de Miraflores Tennis Club, Lima, Peru; Americas relegation play-off; clay surface
Victory	22	II	Singles	Peru	Juan Pablo Varillas	5–7, 6–4, 6–3, 7–6(7–3)
Defeat	23	III	Doubles (with Federico Zeballos)		Duilio Beretta / Jorge Panta	7–6(7–5), 6–1, 4–6, 5–7, 4–6
Defeat	24	IV	Singles		Duilio Beretta	4–6, 2–6, 7–6(7–2), 6–0, 1–6
3–0; 11 July 2016; Club de Tenis La Paz, La Paz, Bolivia; Americas round robin; clay surface
Victory	25	II	Singles	Panama	Alejandro Javier Arrue Martiz	6–1, 6–0
3–0; 12 July 2016; Club de Tenis La Paz, La Paz, Bolivia; Americas round robin; clay surface
Victory	26	II	Singles	Cuba	William Dorantes Sanchez	6–2, 6–2
3–0; 14 July 2016; Club de Tenis La Paz, La Paz, Bolivia; Americas round robin; clay surface
Victory	27	II	Singles	Jamaica	Rowland Phillips	6–3, 6–2
2–0; 16 July 2016; Club de Tenis La Paz, La Paz, Bolivia; Americas Promotion Play off; clay surface
Victory	28	II	Singles	Costa Rica	Pablo Núñez	6–4, 6–4
2–3; 3-5 February 2017; Círculo Deportivo Internacional, San Salvador, El Salvador; Americas first round; hard surface
Defeat	29	II	Singles	El Salvador	Marcelo Arévalo	2–6, 4–6, 5–7
Defeat	30	III	Doubles (with Rodrigo Banzer)		Marcelo Arévalo / Rafael Arévalo	4–6, 7–6(7–5), 4–6, 2–6
4–1; 7-9 April 2017; Club de Tenis Santa Cruz, Santa Cruz, Bolivia; relegation play-off; clay surface
Victory	31	I	Singles	Bahamas	Spencer Newman	6–2, 6–0, 6–2
Victory	32	III	Doubles (with Federico Zeballos)		Philip Wilbert Major / Marvin Rolle	6–7(5–7), 6–1, 6–0, 6–1
1–4; 3-4 February 2018; Estadio "Isaac Gorostiaga" del tradicional Club de Tenis, La Paz, Bolivia; first round; clay surface
Defeat	33	I	Singles	Peru	Duilio Beretta	2–6, 2–6
5–0; 7-8 April 2018; Club de Tenis Trinidad, Trinidad, Bolivia; relegation play-off; clay surface
Victory	34	II	Singles	Puerto Rico	Juan Enrique Marrero	6–0, 6–1
Victory	35	III	Doubles (with Federico Zeballos)		Jorge Emanuel Ortiz García / Jorge Isaias Ortiz García	6–2, 6–4
Victory	36	IV	Singles		Guillermo Torres García	6–0, 6–0

As of 24 May 2022

Dellien's match record against those who have been ranked in the top 10 is as follows (former #1 in bold):

• Hugo Dellien at the Association of Tennis Professionals
• Hugo Dellien at the International Tennis Federation
• Hugo Dellien at the Davis Cup