| Houston, USA | 11/13 16:00 | 25 | [350] Nguyen, Daniel v Jason Jung [130] | 3-6,2-6 | |
| Houston, USA | 11/12 17:00 | 24 | Sumit Sarkar v Nguyen, Daniel | 1-6,0-6 | |
| ITF M25 Tay Ninh | 10/13 08:00 | 29 | [419] Rio Noguchi v Nguyen, Daniel [446] | 4-6,2-6 | |
| ITF M25 Tay Ninh | 10/12 06:20 | 28 | Billy Harris v Nguyen, Daniel | 6-2,6-7,1-6 | |
| ITF M25 Tay Ninh | 10/11 05:00 | 27 | [446] Nguyen, Daniel v Sekiguchi, Shuichi [283] | Retired | |
| ITF M25 Tay Ninh | 10/10 05:00 | 26 | [446] Nguyen, Daniel v Arjun Kadhe [168] | 6-2,7-6 | |
| ITF M25 Tay Ninh | 10/09 07:35 | 25 | [446] Nguyen, Daniel v Ehara, Hiroyasu [464] | 6-4,6-2 | |
| ITF M25 Tay Ninh | 10/06 09:00 | 29 | [496] Nam Hoang Ly v Nguyen, Daniel [445] | 3-6,5-7 | |
| ITF M25 Tay Ninh | 10/05 09:00 | 28 | Kazuki Nishiwaki v Nguyen, Daniel | 2-6,3-6 | |
| ITF M25 Tay Ninh | 10/04 09:30 | 27 | Nguyen, Daniel v Goncalo Oliveira | Walkover | |
| ITF M25 Tay Ninh | 10/03 02:00 | 26 | Nguyen, Daniel v Makoto Ochi | 4-6,6-4,7-5 | |
| ITF M25 Tay Ninh | 10/02 05:00 | 25 | Nguyen, Daniel v Rogic Hadzalic, Alen | 6-3,6-1 | |
| Columbus III, USA | 09/16 17:10 | 24 | Nguyen, Daniel v Petit, Gabriel | 6-7,6-3,4-6 | |
| Challenger Cary | 09/12 16:25 | 26 | [469] Nguyen, Daniel v Aragone, JC [341] | 3-6,2-6 | |
| Challenger Cary | 09/11 15:00 | 25 | [192] Mitchell Krueger v Nguyen, Daniel [469] | 3-6,6-3,3-6 | |
| Challenger Cary | 09/09 21:30 | 24 | Nguyen, Daniel v Sigouin, Benjamin | 6-1,6-3 | |
| Winston-Salem, USA | 08/18 19:00 | 164 | Sarmiento, Raymond v Nguyen, Daniel | 6-2,6-3 | |
| Winston-Salem, USA | 08/17 19:40 | 64 | Nguyen, Daniel v Arevalo-Gonzalez, Marcelo | 6-4,4-6,7-6 | |
| ITF M25 Memphis | 08/16 20:00 | 28 | Roberto Cid Subervi v Nguyen, Daniel | 6-4,4-6,6-2 | |
| ITF M25 Memphis | 08/15 23:00 | 27 | King, Kevin v Nguyen, Daniel | 4-6,3-6 | |
| ITF M25 Memphis | 08/14 15:00 | 26 | Caruana, Liam v Nguyen, Daniel | 4-6,6-7 | |
| ITF M25 Memphis | 08/13 15:00 | 25 | Peck, Joshua v Nguyen, Daniel | Retired | |
| Challenger Winnipeg | 07/13 17:00 | 28 | [112] Schnur, Brayden v Nguyen, Daniel [441] | 6-2,7-5 | |
| Challenger Winnipeg | 07/12 17:00 | 27 | [441] Nguyen, Daniel v Antoine Hoang [103] | 7-6,4-6,6-3 | |
| Challenger Winnipeg | 07/11 16:00 | 26 | [441] Nguyen, Daniel v Enzo Couacaud [214] | 1-6,6-3,6-2 | |
| Challenger Winnipeg | 07/10 23:35 | 25 | [159] Soeda, Go v Nguyen, Daniel [441] | Retired | |
| Challenger Winnipeg | 07/09 17:30 | 24 | [390] Alexis Galarneau v Nguyen, Daniel [441] | 6-1,1-6,5-7 | |
| Challenger Columbus | 06/11 17:35 | 25 | [449] Nguyen, Daniel v Thai-Son Kwiatkowski [228] | 6-4,2-6,4-6 | |
| Challenger Columbus | 06/10 20:45 | 24 | [449] Nguyen, Daniel v Gijs Brouwer [413] | 6-4,6-7,7-5 | |
| Little Rock, USA | 06/07 17:00 | 26 | [352] Shane, Ryan v Nguyen, Daniel [485] | 3-6,6-3,6-4 |