| Davis Cup | 09/18 15:00 | - | [144] Hugo Dellien v Ruben Bemelmans [221] | 6-3,6-4 | |
| US Open | 08/26 23:10 | 15 | [223] Ivo Karlovic v Hugo Dellien [137] | 7-5,6-7,6-2 | |
| US Open | 08/25 20:35 | 14 | [171] Alessandro Giannessi v Hugo Dellien [137] | 1-6,3-6 | |
| Challenger San Marino | 08/14 19:10 | 28 | Hugo Dellien v Orlando Luz | 4-6,2-6 | |
| Challenger San Marino | 08/13 16:35 | 27 | [206] Felipe M R Alves v Hugo Dellien [142] | 3-6,2-6 | |
| Challenger San Marino | 08/11 15:00 | 26 | [225] Marius Copil v Hugo Dellien [142] | 6-4,5-7,4-6 | |
| Challenger San Marino | 08/10 13:25 | 25 | Manuel Mazza v Hugo Dellien | 4-6,5-7 | |
| Challenger Cordenons | 08/03 08:30 | 25 | [139] Hugo Dellien v Camilo Ugo Carabelli [304] | 6-7,0-6 | |
| Olympics 2020 - Men | 07/24 06:35 | 24 | [1] Novak Djokovic v Hugo Dellien [139] | 6-2,6-2 | |
| Wimbledon | 06/23 13:20 | 19 | [129] Hugo Dellien v Daniel Masur [217] | 3-6,6-7 | |
| Wimbledon | 06/22 12:15 | 14 | [129] Hugo Dellien v Aidan Mchugh [477] | 6-2,6-1 | |
| Challenger Prostejov | 06/17 10:00 | 27 | [180] Alex Molcan v Hugo Dellien [129] | 6-3,6-1 | |
| Challenger Prostejov | 06/16 08:30 | 26 | [287] Michael Vrbensky v Hugo Dellien [129] | 1-6,2-6 | |
| Challenger Prostejov | 06/14 14:20 | 25 | [383] Andrew Paulson v Hugo Dellien [129] | 1-6,3-6 | |
| Challenger Bratislava | 06/07 11:50 | 25 | [450] Andrey Kuznetsov v Hugo Dellien [124] | 6-2,4-6,6-3 | |
| French Open | 05/27 13:30 | 19 | [124] Hugo Dellien v Oscar Otte [152] | 2-6,0-6 | |
| French Open | 05/26 12:50 | 15 | [124] Hugo Dellien v Blaz Kavcic [216] | 7-6,6-7,6-4 | |
| French Open | 05/24 20:40 | 14 | [124] Hugo Dellien v Dimitar Kuzmanov [241] | 3-6,6-2,6-1 | |
| Challenger Oeiras | 05/20 13:00 | 27 | [121] Hugo Dellien v Taro Daniel [112] | 1-6,6-3,1-6 | |
| Challenger Oeiras | 05/19 10:00 | 26 | [71] Jiri Vesely v Hugo Dellien [121] | Retired | |
| Challenger Oeiras | 05/17 14:15 | 25 | [171] Sebastian Ofner v Hugo Dellien [121] | 1-6,6-7 | |
| ATP Rome | 05/12 11:20 | 25 | [6] Alexander Zverev v Hugo Dellien [128] | 6-2,6-2 | |
| ATP Rome | 05/10 13:10 | 24 | [128] Hugo Dellien v Adrian Mannarino [36] | 2-6,7-5,6-2 | |
| ATP Rome | 05/09 13:35 | 19 | [57] Aljaz Bedene v Hugo Dellien [127] | 2-6,1-6 | |
| ATP Rome | 05/08 15:15 | 14 | [127] Hugo Dellien v Jaume Munar [87] | 6-4,6-1 | |
| Challenger Biella | 05/05 13:05 | 26 | [215] Andrea Collarini v Hugo Dellien [127] | 6-1,7-5 | |
| Challenger Biella | 05/04 15:55 | 25 | [326] Stefano Napolitano v Hugo Dellien [127] | 0-6,7-5,1-6 | |
| Challenger Rome | 04/26 12:25 | 25 | [317] Giulio Zeppieri v Hugo Dellien [125] | 1-6,6-3,6-4 | |
| Challenger Rome | 04/20 16:15 | 25 | [287] Vit Kopriva v Hugo Dellien [125] | 7-6,6-3 | |
| Challenger Belgrade | 04/14 13:15 | 26 | [142] Brandon Nakashima v Hugo Dellien [122] | 6-2,6-2 |
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.