Stadium: Court S. Tsitsipas Round: 44 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2020/11/18 10:50 | Naoki Tajima v Hanwen Li | 7-5,2-6,1-6 |
| ITF - M15 Héraklion | 2020/11/17 07:30 | Stefan Palosi v Naoki Tajima | 5-7,6-3,10-5 |
| ITF - M15 Héraklion | 2020/11/16 10:00 | Roman Andres Burruchaga v Naoki Tajima | 3-6,2-6 |
| ITF - M15 Héraklion | 2020/11/15 08:00 | Michalis Sakellaridis v Naoki Tajima | 1-6,1-6 |
| ITF - M15 Héraklion | 2020/11/08 12:00 | Billy Harris v Naoki Tajima | 5-7,6-1,10-7 |
| Geelong, Singles Qualifying M-ITF-AUS-04A | 2020/03/10 23:00 | Naoki Tajima v Rio Noguchi | 0-6,1-6 |
| ITF - M25 Mildura | 2020/03/03 02:40 | Naoki Tajima v Crnokrak, Alexander | 6-3,4-6,5-7 |
| ITF - M15 Antalya | 2020/02/19 09:15 | Jonas Forejtek v Naoki Tajima | 6-4,6-2 |
| ITF - M15 Héraklion | 2020/11/23 08:00 | Stephanos Schinas v Hartmeier, Patrik | 6-4,1-6,11-13 |
| ITF - M15 Héraklion | 2020/11/16 07:30 | Hartmeier, Patrik v Stuart Parker | 3-6,1-6 |
| ITF - M15 Héraklion | 2020/11/15 08:00 | Ioannis Xilas v Hartmeier, Patrik | 6-1,3-6,5-10 |
| Sarreguemines, Singles M-ITF-FRA-22A | 2020/10/25 10:30 | Hartmeier, Patrik v Milan Welte | 6-2,6-7,5-10 |
| ITF M15 Forbach | 2020/09/28 14:20 | Baltensperger, Raphael v Hartmeier, Patrik | 6-3,6-3 |
| ITF M15 Forbach | 2020/09/28 07:00 | Magnaudet, Lucas v Hartmeier, Patrik | 6-7,1-6 |
| ITF - M15 Manacor | 2020/01/13 10:30 | Hartmeier, Patrik v Coppini, Alessandro | 5-7,3-6 |
| ITF - M15 Manacor | 2020/01/12 11:30 | Martirosian, David v Hartmeier, Patrik | 2-6,6-7 |