| Challenger de Lima | 08/25 21:25 | 28 | Blaise Bicknell v Murkel Dellien | 3-6,7-6,6-3 | |
| Challenger de Lima | 08/24 19:00 | 27 | [287] Murkel Dellien v Gonzalo Lama [430] | 6-2,7-6 | |
| Challenger de Lima | 08/23 15:00 | 26 | [287] Murkel Dellien v Pedro Sakamoto [358] | 5-7,6-0,6-0 | |
| Challenger de Lima | 08/22 16:30 | 25 | [287] Murkel Dellien v Mateus Alves [456] | 6-1,2-6,6-0 | |
| ITF M25 Trujillo | 08/19 14:55 | 28 | [343] Gustavo Heide v Murkel Dellien [288] | 6-4,6-4 | |
| ITF M25 Trujillo | 08/18 15:00 | 27 | [478] Pedro Boscardin Dias v Murkel Dellien [288] | 3-6,2-6 | |
| ITF M25 Trujillo | 08/17 15:00 | 26 | Sebastian Rodriguez v Murkel Dellien | 1-6,2-6 | |
| ITF M25 Trujillo | 08/15 14:00 | 25 | Alberto O A Berrospi v Murkel Dellien | 4-6,3-6 | |
| Challenger de Santo Domingo | 08/11 20:00 | 27 | [312] Murkel Dellien v Genaro Alberto Olivieri [193] | 3-6,3-6 | |
| Challenger de Santo Domingo | 08/09 19:15 | 26 | [312] Murkel Dellien v Mateus D C C Alves [494] | 4-6,6-3,6-4 | |
| Challenger de Santo Domingo | 08/08 16:00 | 25 | [143] Flavio Cobolli v Murkel Dellien [312] | 4-6,1-6 | |
| ITF M25 Gandia | 07/22 16:00 | 28 | Sergi Perez Contri v Murkel Dellien | 6-3,6-1 | |
| ITF M25 Gandia | 07/21 16:00 | 27 | Valerio Aboian v Murkel Dellien | 1-6,5-7 | |
| ITF M25 Gandia | 07/20 15:55 | 26 | [352] Gabriel Roveri Sidney v Murkel Dellien [323] | Retired | |
| ITF M25 Gandia | 07/19 09:30 | 25 | Samuel M Arjona v Murkel Dellien | 3-6,0-6 | |
| ITF M25 Kassel | 07/15 10:55 | 28 | [415] Daniel Dutra Da Silva v Murkel Dellien [328] | 6-4,7-6 | |
| ITF M25 Kassel | 07/14 09:55 | 27 | [440] Hady Habib v Murkel Dellien [328] | 7-5,3-6,2-6 | |
| ITF M25 Kassel | 07/13 09:30 | 26 | [497] Joao Domingues v Murkel Dellien [328] | 3-6,4-6 | |
| ITF M25 Kassel | 07/12 14:05 | 25 | Alessio Vasquez Gehrke v Murkel Dellien | 4-6,3-6 | |
| Challenger de Troyes | 07/06 09:00 | 26 | [328] Murkel Dellien v Terence Atmane [239] | 6-2,2-6,4-6 | |
| Challenger de Troyes | 07/04 08:30 | 25 | [275] Nikolas S Izquierdo v Murkel Dellien [328] | 6-7,6-0,4-6 | |
| Challenger de Módena | 06/27 12:10 | 25 | [261] Titouan Droguet v Murkel Dellien [325] | 6-4,6-3 | |
| Challenger de Blois | 06/21 12:55 | 26 | [395] Kyrian Jacquet v Murkel Dellien [340] | 6-4,6-3 | |
| Challenger de Blois | 06/20 10:55 | 25 | [340] Murkel Dellien v Alex Michelsen [246] | 6-3,7-5 | |
| ITF M25 Grasse | 06/17 10:50 | 28 | [321] Murkel Dellien v Titouan Droguet [275] | 4-6,0-6 | |
| ITF M25 Grasse | 06/16 13:55 | 27 | [483] Tristan Lamasine v Murkel Dellien [321] | 1-6,6-7 | |
| ITF M25 Grasse | 06/15 13:30 | 26 | Adrien Gobat v Murkel Dellien | 6-7,1-6 | |
| ITF M25 Grasse | 06/13 07:30 | 25 | Tristan Piombo v Murkel Dellien | 2-6,3-6 | |
| ITF M25 Córdoba | 06/08 15:00 | 26 | Max Alcala Gurri v Murkel Dellien | 1-6,6-3,6-4 | |
| ITF M25 Córdoba | 06/07 08:00 | - | Francisco J Martinez Baena v Murkel Dellien | 1-6,2-6 |
Murkel Alejandro Dellien Velasco (born 16 September 1997) is a Bolivian tennis player. He has a career-high ATP singles ranking of No. 263, achieved on 30 October 2023. He is the current No. 2 Bolivian tennis player. He also has a career-high ATP doubles ranking of No. 186 achieved on 29 January 2024.
Dellien played college tennis at Wichita State.
Dellien represents Bolivia at the Davis Cup, where he has a W/L record of 1–0.
In 2021 he defeated Zizou Bergs in his first Davis Cup rubber.