Stadium: Centre Court Round: 25 Ground: Hardcourt outdoor
| Columbus III, USA | 2019/09/16 17:10 | Nguyen, Daniel v Petit, Gabriel | 6-7,6-3,4-6 |
| Challenger Cary | 2019/09/12 16:25 | Nguyen, Daniel v Aragone, JC | 3-6,2-6 |
| Challenger Cary | 2019/09/11 15:00 | Mitchell Krueger v Nguyen, Daniel | 3-6,6-3,3-6 |
| Challenger Cary | 2019/09/09 21:30 | Nguyen, Daniel v Sigouin, Benjamin | 6-1,6-3 |
| Winston-Salem, USA | 2019/08/18 19:00 | Sarmiento, Raymond v Nguyen, Daniel | 6-2,6-3 |
| Winston-Salem, USA | 2019/08/17 19:40 | Nguyen, Daniel v Arevalo-Gonzalez, Marcelo | 6-4,4-6,7-6 |
| ITF M25 Memphis | 2019/08/16 20:00 | Roberto Cid Subervi v Nguyen, Daniel | 6-4,4-6,6-2 |
| ITF M25 Memphis | 2019/08/15 23:00 | King, Kevin v Nguyen, Daniel | 4-6,3-6 |
| ITF M15 Novi Sad | 2019/08/13 11:20 | Stipic, Filip v Rogic Hadzalic, Alen | 6-2,6-3 |
| ITF M15 Novi Sad | 2019/08/06 08:00 | Rogic Hadzalic, Alen v Kekez, Duje | 6-3,1-6,11-13 |
| ITF M15 Novi Sad | 2019/08/05 10:30 | Rogic Hadzalic, Alen v Rakic, Strahinja | 6-3,6-3 |
| ITF M15 Novi Sad | 2019/08/01 08:00 | Rogic Hadzalic, Alen v Borsos, Gabor | 2-6,2-6 |
| ITF M15 Novi Sad | 2019/07/31 08:00 | Rogic Hadzalic, Alen v Spasojevic, Stefan | 6-2,6-1 |
| ITF M15 Novi Sad | 2019/07/30 08:00 | Rogic Hadzalic, Alen v Nincevic, Frane | 6-3,6-2 |
| ITF M15 Novi Sad | 2019/07/29 08:00 | Rogic Hadzalic, Alen v Wakita, Shunsuke | 0-6,7-6,10-8 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/07/11 10:20 | Rogic Hadzalic, Alen v Pena Lopez, Manuel | 2-6,4-6 |