| US Open | 08/21 20:40 | 15 | [104] Billy Harris v Murkel Dellien [176] | 6-1,6-3 | |
| US Open | 08/20 17:05 | 14 | Murkel Dellien v Kimmer Coppejans | 2-6,7-5,6-3 | |
| Challenger Santo Domingo | 08/14 22:40 | 26 | [398] Ryan Seggerman v Murkel Dellien [181] | 4-6,7-6,7-6 | |
| Challenger Santo Domingo | 08/12 20:30 | 25 | [220] Alexis Galarneau v Murkel Dellien [181] | 6-7,6-3,1-6 | |
| Challenger Tampere | 07/23 12:10 | 25 | [313] Carlos Taberner v Murkel Dellien [168] | 4-6,6-3,6-3 | |
| Challenger Amersfoort | 07/19 17:00 | 27 | [168] Murkel Dellien v Max Houkes [386] | 4-6,5-7 | |
| Challenger Amersfoort | 07/18 11:25 | 26 | [264] Jiri Vesely v Murkel Dellien [168] | 3-6,4-6 | |
| Challenger Amersfoort | 07/17 14:30 | 25 | Murkel Dellien v Alec Deckers | 4-6,7-6,6-4 | |
| Challenger Iasi | 07/09 14:30 | 25 | [222] Dmitry Popko v Murkel Dellien [214] | 6-4,6-2 | |
| Challenger Brasov | 07/07 12:30 | 29 | [214] Murkel Dellien v Dmitry Popko [222] | 6-3,7-5 | |
| Challenger Brasov | 07/07 07:30 | 28 | [214] Murkel Dellien v Nerman Fatic [244] | 6-3,6-2 | |
| Challenger Brasov | 07/06 07:30 | 27 | Radu Mihai Papoe v Murkel Dellien | 4-6,4-6 |
Murkel Alejandro Dellien Velasco (born 16 September 1997) is a Bolivian tennis player. He has a career-high ATP singles ranking of No. 168, achieved on 15 July 2024. He is the current No. 2 Bolivian tennis player. He also has a career-high ATP doubles ranking of No. 174 achieved on 1 April 2024. Dellien represents Bolivia at the Davis Cup, where he has a W/L record of 2–4.