| French Open Qual | 05/21 08:00 | 44 | [272] Illya Marchenko v Hugo Dellien [139] | 4-6,2-6 | |
| Challenger Savannah | 05/06 18:35 | 29 | [158] Hugo Dellien v Christian Harrison [244] | 6-1,1-6,6-4 | |
| Challenger Savannah | 05/05 16:00 | 28 | [140] Michael Mmoh v Hugo Dellien [158] | 6-1,5-7,3-6 | |
| Challenger Savannah | 05/04 15:25 | 27 | [240] Guilherme Clezar v Hugo Dellien [158] | 7-5,4-6,6-7 | |
| Challenger Savannah | 05/02 14:30 | 26 | [168] Marc Polmans v Hugo Dellien [158] | 6-7,4-6 | |
| Challenger Savannah | 04/30 14:00 | 25 | [239] Jan Choinski v Hugo Dellien [158] | 6-2,1-6,2-6 | |
| Challenger Tallahassee | 04/27 19:35 | 28 | [252] Noah Rubin v Hugo Dellien [172] | 6-2,6-4 | |
| Challenger Tallahassee | 04/26 17:05 | 27 | [172] Hugo Dellien v Thomaz Bellucci [222] | 7-5,7-6 | |
| Challenger Tallahassee | 04/25 16:50 | 26 | [223] Mitchell Krueger v Hugo Dellien [172] | 3-6,2-6 | |
| Challenger Tallahassee | 04/24 19:35 | 25 | [204] Enrique Lopez-Perez v Hugo Dellien [172] | 5-7,2-6 | |
| Challenger Sarasota | 04/22 18:20 | 29 | [223] Facundo Bagnis v Hugo Dellien [231] | 6-2,4-6,2-6 | |
| Challenger Sarasota | 04/21 18:30 | 28 | [231] Hugo Dellien v Juan Ignacio Londero [218] | 6-3,6-3 | |
| Challenger Sarasota | 04/20 20:30 | 27 | [231] Hugo Dellien v Stefan Kozlov [170] | 5-7,6-1,7-6 | |
| Challenger Sarasota | 04/18 14:00 | 26 | [151] Michael Mmoh v Hugo Dellien [231] | 3-6,3-6 | |
| Challenger Sarasota | 04/17 14:00 | 25 | [231] Hugo Dellien v Christian Garin [216] | Retired | |
| Davis Cup | 04/07 16:10 | 28 | Hugo Dellien v Juan E Marrero | 6-0,6-1 | |
| ITF Italy F5 | 03/31 12:00 | 28 | [308] Martin Cuevas v Hugo Dellien [259] | 6-2,6-4 | |
| ITF Italy F5 | 03/30 13:40 | 27 | Filip Horansky v Hugo Dellien | 1-6,2-6 | |
| ITF Italy F5 | 03/29 12:00 | 26 | Jules Okala v Hugo Dellien | 3-6,6-2,1-6 | |
| ITF Italy F5 | 03/28 12:30 | 25 | Pascal Meis v Hugo Dellien | 0-6,2-6 | |
| ITF Italy F4 | 03/24 11:25 | 28 | Hugo Dellien v Attila Balazs | 3-6,3-6 | |
| ITF Italy F4 | 03/23 15:00 | - | [259] Hugo Dellien v Attila Balazs [203] | 3-6,3-5 | |
| ITF Italy F4 | 03/22 19:15 | 27 | Edoardo Eremin v Hugo Dellien | 3-6,1-6 | |
| ITF Italy F4 | 03/22 14:30 | 26 | Gianluca Di Nicola v Hugo Dellien | 4-6,5-7 | |
| ITF Italy F4 | 03/21 14:00 | 25 | Filippo Leonardi v Hugo Dellien | 3-6,0-6 | |
| ITF Italy F3 | 03/18 14:00 | 29 | Martin Cuevas v Hugo Dellien | 4-6,6-7 | |
| ITF Italy F3 | 03/17 13:00 | 28 | Hugo Dellien v Andrea Basso | 6-4,2-6,6-3 | |
| ITF Italy F3 | 03/16 13:00 | 27 | Ergi Kirkin v Hugo Dellien | 6-1,3-6,3-6 | |
| ITF Italy F3 | 03/15 13:00 | 26 | Gianluca Di Nicola v Hugo Dellien | 4-6,2-6 | |
| ITF Italy F3 | 03/14 16:40 | 25 | Luca George Tatomir v Hugo Dellien | 6-7,0-6 |
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.