| US Open | 08/29 15:00 | 23 | Hugo Dellien v Matteo Berrettini | Cancelled | |
| ATP Winston-Salem | 08/21 20:10 | 24 | Hugo Dellien v Chun Hsin Tseng | Cancelled | |
| Wimbledon | 06/28 12:00 | 23 | [27] Alex De Minaur v Hugo Dellien [80] | 6-1,6-3,7-5 | |
| Challenger Parma | 06/14 13:30 | 25 | Flavio Cobolli v Hugo Dellien | Cancelled | |
| Challenger Lyon | 06/07 15:50 | 25 | [85] Hugo Dellien v Hugo Grenier [150] | 3-6,1-6 | |
| Challenger Forli | 05/30 19:00 | 25 | [216] Giulio Zeppieri v Hugo Dellien [90] | 7-6,6-3 | |
| French Open | 05/25 09:00 | 24 | [90] Hugo Dellien v Karen Khachanov [25] | 6-4,4-6,6-7,3-6 | |
| French Open | 05/22 09:00 | 23 | [87] Hugo Dellien v Dominic Thiem [194] | 6-3,6-2,6-4 | |
| ATP Rome | 05/08 11:15 | 19 | [81] Hugo Dellien v Laslo Djere [54] | 4-6,2-6 | |
| ATP Rome | 05/07 09:30 | 14 | [45] Holger N Rune v Hugo Dellien [81] | 1-6,6-1,3-6 | |
| ATP Madrid | 05/03 10:00 | 24 | [14] Hubert Hurkacz v Hugo Dellien [81] | 7-5,6-7,6-3 | |
| ATP Madrid | 05/01 13:45 | - | [51] Mackenzie McDonald v Hugo Dellien [85] | 5-7,1-6 | |
| ATP Madrid | 04/30 15:35 | 25 | [85] Hugo Dellien v Hugo Gaston [72] | 6-1,6-2 | |
| ATP Estoril | 04/28 12:00 | 26 | [80] Richard Gasquet v Hugo Dellien [85] | 7-6,6-2 | |
| ATP Estoril | 04/26 14:25 | 25 | [74] Jiri Vesely v Hugo Dellien [85] | 3-6,3-6 | |
| ATP Estoril | 04/24 11:00 | 19 | [89] Hugo Dellien v Max Purcell [166] | 6-1,6-2 | |
| ATP Estoril | 04/23 11:00 | 14 | [89] Hugo Dellien v Gastao Elias [154] | 6-4,6-4 | |
| ATP Barcelona | 04/20 09:00 | 25 | [29] Frances Tiafoe v Hugo Dellien [89] | 7-6,6-1 | |
| ATP Barcelona | 04/19 10:40 | 24 | [89] Hugo Dellien v Manuel Guinard [152] | 6-4,7-5 | |
| ATP Barcelona | 04/19 09:00 | 24 | Hugo Dellien v Alejandro Davidovich Fokina | Cancelled | |
| ATP Barcelona | 04/17 10:15 | 19 | [92] Hugo Dellien v Gian Marco Moroni [180] | 7-5,6-2 | |
| ATP Barcelona | 04/16 08:00 | 45 | Hugo Dellien v Daniel Rincon | 6-3,6-0 | |
| ATP Monte Carlo | 04/11 16:50 | 24 | [14] Hubert Hurkacz v Hugo Dellien [92] | 7-5,6-4 | |
| ATP Monte Carlo | 04/10 10:40 | 19 | [93] Hugo Dellien v Taro Daniel [104] | 6-4,6-7,6-3 | |
| ATP Monte Carlo | 04/09 12:15 | 14 | [68] Adrian Mannarino v Hugo Dellien [93] | 1-6,6-4,5-7 | |
| ATP Marrakech | 04/05 13:30 | 25 | [93] Hugo Dellien v Botic Van De Zandschulp [43] | 3-6,6-3,4-6 | |
| Challenger Santa Cruz | 03/22 14:00 | 25 | Hugo Dellien v Paul Jubb | Cancelled | |
| Challenger Concepcion | 03/20 19:00 | 29 | [101] Hugo Dellien v Tomas Martin Etcheverry [123] | 3-6,2-6 | |
| Challenger Concepcion | 03/19 17:45 | 28 | [101] Hugo Dellien v Marcelo Tomas Barrios Vera [145] | 6-3,6-0 | |
| Challenger Concepcion | 03/18 19:10 | 27 | [101] Hugo Dellien v Thiago Agustin Tirante [205] | 6-0,6-3 |
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.