Stadium: Centre Court Round: 26 Ground: Hardcourt outdoor
| Challenger Yokkaichi | 2019/08/07 05:15 | Renta Tokuda v Shinji Hazawa | 6-4,6-7,0-6 |
| Challenger Yokkaichi | 2019/08/05 03:40 | Shinji Hazawa v Thomas Fancutt | 6-4,6-1 |
| ITF M25 Kunshan | 2019/07/05 01:30 | Jonathan Mridha v Shinji Hazawa | 4-6,6-1,6-4 |
| ITF M25 Kunshan | 2019/07/04 03:50 | Bingyu Yu v Shinji Hazawa | 1-6,1-6 |
| ITF M25 Kunshan | 2019/07/02 09:35 | Garrett Johns v Shinji Hazawa | 6-7,1-6 |
| ITF M25 Yinchuan | 2019/06/28 07:00 | Xin Gao v Shinji Hazawa | 6-2,6-4 |
| ITF M25 Yinchuan | 2019/06/28 03:35 | Zhou Mingzhou v Shinji Hazawa | 4-6,2-6 |
| ITF M25 Matsuyama | 2019/04/10 03:30 | Yuki Mochizuki v Shinji Hazawa | 6-0,6-2 |
| Challenger Yokkaichi | 2019/08/07 08:15 | Kento Takeuchi v Tatsuma Ito | 6-7,1-6 |
| Challenger Chengdu | 2019/08/03 05:30 | Tatsuma Ito v Hyeon Chung | 2-6,6-7 |
| Challenger Chengdu | 2019/08/02 09:15 | Shuichi Sekiguchi v Tatsuma Ito | 2-6,1-6 |
| Challenger Chengdu | 2019/08/01 06:15 | Matthew Romios v Tatsuma Ito | 2-6,1-6 |
| Challenger Chengdu | 2019/07/30 05:10 | Makoto Ochi v Tatsuma Ito | 4-6,3-6 |
| ATP Newport | 2019/07/14 15:00 | Tatsuma Ito v John-Patrick Smith | 2-6,6-3,3-6 |
| Wimbledon | 2019/06/24 15:05 | Steven Diez v Tatsuma Ito | 6-4,6-1 |
| Challenger Ilkley | 2019/06/18 10:00 | Tatsuma Ito v Ruben Bemelmans | 7-6,3-6,4-6 |