| Challenger Belgrade | 04/13 08:00 | 25 | [143] Tallon Griekspoor v Hugo Dellien [122] | 6-7,4-6 | |
| ATP Buenos Aires | 02/27 15:10 | 14 | Hugo Dellien v Pedro Sakamoto | Walkover | |
| ATP Cordoba | 02/23 18:30 | 25 | [112] Hugo Dellien v Marco Cecchinato [87] | 2-6,6-4,1-6 | |
| Challenger Concepcion | 02/19 16:45 | 27 | [312] Sebastian Baez v Hugo Dellien [112] | 6-1,6-1 | |
| Challenger Concepcion | 02/18 15:00 | 26 | [379] Hernan Casanova v Hugo Dellien [112] | 1-6,3-6 | |
| Challenger Concepcion | 02/16 17:25 | 25 | [235] Felipe M R Alves v Hugo Dellien [112] | 0-6,6-7 | |
| Australian Open | 02/08 06:40 | 23 | [68] Dominik Koepfer v Hugo Dellien [112] | 7-5,6-2,6-4 | |
| ATP Great Ocean Road Open | 02/02 07:00 | 24 | [112] Hugo Dellien v Cedrik-Marcel Stebe [128] | 4-6,4-6 | |
| Australian Open | 01/13 10:35 | 19 | [111] Hugo Dellien v Carlos Alcaraz [141] | 2-6,3-6 | |
| Australian Open | 01/12 12:50 | 15 | [111] Hugo Dellien v Andrew Harris [232] | 6-4,7-6 | |
| Australian Open | 01/11 09:40 | 60 | [111] Hugo Dellien v Alejandro Tabilo [167] | 6-1,6-0 | |
| French Open | 09/29 11:30 | 23 | [104] Hugo Dellien v Ricardas Berankis [66] | 1-6,4-6,4-6 | |
| ATP Rome | 09/13 11:15 | 19 | [97] Hugo Dellien v Giulio Zeppieri [357] | 6-7,6-3,0-6 | |
| ATP Rome | 09/12 13:30 | 14 | [97] Hugo Dellien v Alessandro Giannessi [162] | 7-5,6-4 | |
| Challenger Aix en Provence | 09/07 13:20 | 25 | [120] Leonardo Mayer v Hugo Dellien [97] | 6-3,6-2 | |
| US Open | 09/01 22:25 | 23 | [66] Marton Fucsovics v Hugo Dellien [97] | 6-3,6-3,6-1 | |
| Davis Cup | 03/07 22:30 | 45 | Hugo Dellien v Roberto Cid Subervi | 7-5,6-4 | |
| Davis Cup | 03/07 18:30 | - | [94] Hugo Dellien v Roberto Cid Subervi [215] | 7-5,6-4 | |
| Davis Cup | 03/06 20:45 | 45 | [94] Hugo Dellien v Jose Hernandez-Fernandez [289] | 6-3,6-4 | |
| ATP Santiago | 02/28 20:50 | 27 | [297] Renzo Olivo v Hugo Dellien [94] | 3-6,7-6,7-5 | |
| ATP Santiago | 02/26 19:40 | 26 | [300] Marcelo Tomas Barrios Vera v Hugo Dellien [94] | 3-6,6-7 | |
| ATP Santiago | 02/24 16:00 | 25 | [112] Marco Cecchinato v Hugo Dellien [94] | 3-6,6-1,3-6 | |
| ATP Rio De Janeiro | 02/17 21:40 | 25 | [133] Pedro Martinez v Hugo Dellien [78] | 3-6,6-2,7-5 | |
| ATP Buenos Aires | 02/10 23:55 | 25 | [87] Federico Delbonis v Hugo Dellien [77] | 1-6,6-3,7-5 | |
| ATP Cordoba | 02/04 20:50 | 25 | [77] Hugo Dellien v Pedro Cachin [354] | 1-6,1-6 | |
| Australian Open | 01/21 03:30 | 23 | [1] Rafael Nadal v Hugo Dellien [73] | 6-2,6-3,6-0 | |
| ATP Auckland | 01/11 00:20 | 64 | [73] Hugo Dellien v Michael Mmoh [228] | 0-6,1-6 | |
| Challenger Montevideo | 11/08 21:20 | 27 | [235] Thiago Seyboth Wild v Hugo Dellien [75] | 6-2,6-4 | |
| Challenger Montevideo | 11/07 18:20 | 26 | [192] Joao Domingues v Hugo Dellien [75] | 3-6,2-6 | |
| Challenger Montevideo | 11/06 17:15 | 25 | [409] Nicolas Mejia v Hugo Dellien [75] | 6-1,3-6,1-6 |
Wikipedia - Hugo Dellien
Hugo Dellien Velasco (Spanish pronunciation: [ˈuɣo ðeˈljen]; 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.