Stadium: Court 6 Round: 25 Ground: Clay
| ITF M15 Monastir | 2020/09/28 09:00 | Anthony Genov v Aristotelis Thanos | 7-5,7-6 |
| ITF M15 Monastir | 2020/09/27 09:30 | Thijmen Loof v Aristotelis Thanos | 6-7,6-4,5-10 |
| ITF M15 Monastir | 2020/09/21 08:00 | Karl Kiur Saar v Aristotelis Thanos | 7-6,6-1 |
| ITF M15 Monastir | 2020/09/20 10:00 | Makary Adamek v Aristotelis Thanos | 2-6,4-6 |
| ITF M15 Monastir | 2020/09/17 10:25 | Aristotelis Thanos v Alexander Shevchenko | 6-7,3-6 |
| ITF M15 Heraklion | 2020/03/12 08:30 | Robert Strombachs v Aristotelis Thanos | 2-6,6-3,2-6 |
| ITF M15 Heraklion | 2020/03/11 08:30 | Nino Ehrenschneider v Aristotelis Thanos | 1-6,4-6 |
| ITF M15 Heraklion | 2020/03/10 10:30 | Aristotelis Thanos v Sacha Modica | 5-7,6-3,10-5 |
| ITF M15 Sharm El Sheikh | 2020/02/24 10:00 | Amr Asrawy v Ken Onishi | 4-6,6-0,10-8 |
| ITF M15 Sharm El Sheikh | 2020/02/17 09:00 | Piotr Grynkowski v Ken Onishi | 6-1,6-4 |
| ITF M15 Hong Kong | 2020/01/08 09:30 | Makoto Ochi v Ken Onishi | 7-6,6-2 |
| ITF M15 Hong Kong | 2020/01/07 04:45 | Kousuke Ogura v Ken Onishi | 5-7,4-6 |
| ITF M15 Hong Kong | 2020/01/06 02:00 | Shohei Chikami v Ken Onishi | 4-6,1-6 |
| ITF M15 Te Anau | 2019/12/30 23:00 | Elliot Benchetrit v Ken Onishi | 7-5,6-1 |
| Challenger Kobe | 2019/11/06 01:30 | Luke Saville v Ken Onishi | 6-2,6-2 |
| ITF M25 Taipei | 2019/07/22 04:00 | Han-Chih Lin v Ken Onishi | 6-7,6-3,10-6 |