Stadium: Court 5 Round: 25 Ground: Clay
| Challenger Ostrava | 2023/04/23 13:10 | Rudolf Molleker v Petr Nouza | 7-6,2-6,7-6 |
| Challenger Oeiras | 2023/04/18 11:35 | Sebastian Ofner v Petr Nouza | 6-3,6-4 |
| Challenger Oeiras | 2023/04/17 10:35 | Petr Nouza v Akira Santillan | 6-2,7-5 |
| Challenger Oeiras | 2023/04/16 11:10 | Petr Nouza v Sandro Kopp | 6-2,7-6 |
| Challenger Biel | 2023/03/19 13:15 | Enrico Dalla Valle v Petr Nouza | 7-6,6-4 |
| Challenger Pune | 2023/02/26 05:30 | Petr Nouza v Dominik Palan | 3-6,4-6 |
| Challenger Chennai | 2023/02/16 05:00 | Petr Nouza v Max Purcell | 5-7,3-6 |
| Challenger Chennai | 2023/02/14 08:00 | Luca Nardi v Petr Nouza | 4-6,5-7 |
| Challenger Prague | 2023/05/08 09:00 | Guido Andreozzi v Alex Rybakov | 6-3,6-3 |
| Challenger Prague Qual | 2023/05/07 09:50 | Patrik Rikl v Alex Rybakov | 6-7,5-7 |
| ITF M25 Sabadell | 2023/05/03 11:45 | Alex Rybakov v David Jorda Sanchis | 6-7,3-6 |
| Challenger Savannah | 2023/04/27 15:00 | Alex Rybakov v Mitchell Krueger | 4-6,6-1,0-6 |
| Challenger Savannah | 2023/04/25 14:00 | Nick Chappell v Alex Rybakov | 2-6,3-6 |
| Challenger Tallahassee | 2023/04/18 19:40 | Tung-Lin Wu v Alex Rybakov | 6-4,6-4 |
| Challenger Sarasota | 2023/04/12 20:30 | Alex Rybakov v Zhizhen Zhang | 4-6,6-7 |
| Challenger Sarasota | 2023/04/10 21:25 | Bruno Kuzuhara v Alex Rybakov | 7-5,3-6,4-6 |