Estádio: Court 4 Round: 62 Ground: Clay
| ITF - M15 Šibenik | 2021/05/16 10:00 | Rimpei Kawakami v Mehdi Sadaoui | 6-7,6-1,10-3 |
| ITF - M15 Prijedor | 2021/05/13 07:50 | Rimpei Kawakami v Aldin Setkic | 2-6,4-6 |
| ITF - M15 Prijedor | 2021/05/11 08:00 | Rimpei Kawakami v Stefan Ivic | 6-0,6-1 |
| ITF - M15 Prijedor | 2021/05/10 08:00 | Rimpei Kawakami v Jan Kupcic | 6-0,7-5 |
| ITF - M15 Prijedor | 2021/05/09 07:00 | Rimpei Kawakami v Besir Durguti | 6-3,6-2 |
| ITF - M15 Cairo | 2021/05/05 08:00 | Rimpei Kawakami v Matheus P De Almeida | 1-6,3-6 |
| ITF - M15 Cairo | 2021/05/04 07:55 | Rimpei Kawakami v Leonardo Catani | 7-5,6-0 |
| ITF - M15 Cairo | 2021/05/03 08:00 | Rimpei Kawakami v Essa Qabazard | 6-0,6-0 |
| ITF - M15 Šibenik | 2021/05/16 12:30 | Liam Schiemann v Roman Ruenger | 3-6,2-6 |
| ITF - Holanda F5 | 2018/08/18 08:00 | Kevin Kaczynski v Roman Ruenger | 6-1,6-0 |