Stadium: Court 3 Round: 27 Ground: Hardcourt outdoor
| Challenger Iasi | 2023/07/10 07:00 | Kyrian Jacquet v David Pichler | 6-4,6-2 |
| Challenger Iasi | 2023/07/09 07:30 | Radu Paisvant v David Pichler | 0-6,2-6 |
| ITF M25 Bourg-en-Bresse | 2023/06/27 08:50 | David Pichler v Tiago Pires | 4-6,3-6 |
| Challenger Poznan | 2023/06/18 15:40 | Emilio Nava v David Pichler | 7-6,4-6,6-2 |
| Challenger Bratislava | 2023/06/11 10:00 | Daniel Dutra Da Silva v David Pichler | 2-6,6-2,6-2 |
| ITF M25 Kursumlijska Banja | 2023/06/08 06:55 | David Pichler v Sebastian Prechtel | 2-6,4-6 |
| ITF M25 Kursumlijska Banja | 2023/06/07 16:30 | David Pichler v Ognjen Milic | 6-1,6-3 |
| ITF M25 Rome | 2023/05/30 08:00 | David Pichler v Federico Iannaccone | 3-6,6-3,5-7 |
| ITF M15 Monastir | 2023/07/17 15:00 | Seita Watanabe v Vyacheslav Ovchinnikov | 6-2,6-2 |
| ITF M15 Monastir | 2023/07/16 08:00 | Seita Watanabe v Alberto Bronzetti | 6-2,6-3 |
| ITF M15 Monastir | 2023/07/12 09:25 | Seita Watanabe v Cyril Vandermeersch | 5-7,3-6 |
| ITF M25 Santo Domingo | 2023/06/27 15:30 | Bernard Tomic v Seita Watanabe | 6-4,6-3 |
| ITF M15 Santo Domingo | 2023/06/21 13:30 | Tauheed Browning v Seita Watanabe | 7-6,0-6,7-5 |
| ITF M15 Karuizawa | 2023/05/31 01:00 | Jumpei Yamasaki v Seita Watanabe | 6-4,6-4 |
| UTR Pro Miki | 2023/02/12 02:00 | Tomohiro Masabayashi v Seita Watanabe | 4-6,1-5 |
| UTR Pro Miki | 2023/02/11 03:30 | Yuichiro Inui v Seita Watanabe | 6-7,6-7 |