Stadium: Centre Court Round: 28 Ground: Hardcourt outdoor
| ITF M25 Tay Ninh | 2019/10/04 08:00 | Yusuke Takahashi v Kazuki Nishiwaki | 0-6,6-3,2-6 |
| ITF M25 Tay Ninh | 2019/10/03 02:00 | Kazuki Nishiwaki v Shao-Fan Liu | 4-6,6-2,6-3 |
| ITF M25 Tay Ninh | 2019/10/01 05:55 | Kazuki Nishiwaki v Chien Hsun Lo | 6-3,6-4 |
| Challenger Shanghai | 2019/09/10 02:30 | Kazuki Nishiwaki v Jumpei Yamasaki | 3-6,2-6 |
| Challenger Shanghai | 2019/09/09 02:00 | Kazuki Nishiwaki v N.Sriram Balaji | 6-4,6-3 |
| ITF M15 Cancun | 2019/08/20 20:20 | Jose Olivares v Kazuki Nishiwaki | 6-3,3-6,6-0 |
| Challenger Yokkaichi | 2019/08/07 02:00 | Kazuki Nishiwaki v Yusuke Takahashi | 5-7,6-3,3-6 |
| Challenger Yokkaichi | 2019/08/06 01:00 | Courtney John Lock v Kazuki Nishiwaki | 2-6,2-6 |
| ITF M25 Tay Ninh | 2019/10/03 02:00 | Daniel Nguyen v Makoto Ochi | 4-6,6-4,7-5 |
| ITF M25 Tay Ninh | 2019/10/02 05:00 | Daniel Nguyen v Alen Rogic-Hadzalic | 6-3,6-1 |
| Challenger Columbus 3 | 2019/09/16 17:10 | Daniel Nguyen v Gabriel Petit | 6-7,6-3,4-6 |
| Challenger Cary | 2019/09/12 16:25 | Daniel Nguyen v JC Aragone | 3-6,2-6 |
| Challenger Cary | 2019/09/11 15:00 | Mitchell Krueger v Daniel Nguyen | 3-6,6-3,3-6 |
| Challenger Cary | 2019/09/09 21:30 | Daniel Nguyen v Benjamin Sigouin | 6-1,6-3 |
| ATP Winston-Salem | 2019/08/18 19:00 | Raymond Sarmiento v Daniel Nguyen | 6-2,6-3 |
| ATP Winston-Salem | 2019/08/17 19:40 | Daniel Nguyen v Marcelo Arevalo | 6-4,4-6,7-6 |