Stadium: Court 2 Round: 44 Ground: Clay
| ITF M15 Akishima | 2019/06/11 03:00 | Ko Suzuki v Kazuki Shimizu | 7-5,6-3 |
| ITF M15 Karuizawa | 2019/05/30 04:30 | Haru Inoue v Kazuki Shimizu | 6-2,6-1 |
| ITF M15 Karuizawa | 2019/05/29 05:15 | Kazuki Shimizu v Kousuke Ogura | 7-5,5-7,6-4 |
| ITF M25 Matsuyama | 2019/04/10 03:30 | Gage Brymer v Kazuki Shimizu | 7-6,5-7,6-0 |
| ITF M25 Matsuyama | 2019/04/09 01:00 | Daisuke Sumizawa v Kazuki Shimizu | 6-3,4-6,6-10 |
| ITF M25 Matsuyama | 2019/04/08 01:00 | Kazuki Shimizu v Yuichiro Inui | 6-2,6-0 |
| ITF M15 Tsukuba | 2019/03/25 01:00 | Mick Veldheer v Kazuki Shimizu | 6-1,6-4 |
| ITF M15 Kofu | 2019/03/18 00:30 | Kazuki Shimizu v Kousuke Ogura | 6-7,5-7 |
| ITF M15 Heraklion | 2019/11/10 07:30 | Martin Dimitrov v Grigoriy Korobeynikov | 6-3,6-4 |
| ITF M15 Castellon | 2019/11/05 10:00 | Grigoriy Korobeynikov v Luis Diego Chavez Villalpando | 6-4,3-6,7-10 |
| ITF M15 Castellon | 2019/11/04 13:30 | Grigoriy Korobeynikov v Filippo Giovannini | 6-2,6-1 |
| ITF M15 Nules | 2019/10/28 08:30 | Juan Ignacio Alcalde v Grigoriy Korobeynikov | 6-3,6-4 |
| ITF M15 Bukhara | 2019/10/16 08:40 | Sergey Shipilov v Grigoriy Korobeynikov | 6-2,6-1 |
| ITF M15 Karshi | 2019/10/10 07:00 | Sanjar Fayziev v Grigoriy Korobeynikov | 6-2,6-4 |
| ITF M15 Karshi | 2019/10/09 09:00 | Martin Borisiouk v Grigoriy Korobeynikov | 4-6,4-6 |
| ITF M15 Karshi | 2019/10/08 06:25 | Timur Sottimov v Grigoriy Korobeynikov | 6-2,4-6,11-13 |