Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Arad | 2023/09/25 09:30 | Mihai Razvan Marinescu v Matei Cristian Onofrei | 6-2,6-1 |
| ITF M15 Satu Mare | 2023/09/12 07:00 | Razvan Baiant v Matei Cristian Onofrei | 7-6,6-4 |
| ITF M15 Satu Mare | 2023/09/11 07:00 | Matei Cristian Onofrei v Csongor Hejjas | 6-0,6-4 |
| ITF M15 Satu Mare | 2023/09/10 07:00 | Matei Cristian Onofrei v David Gabor | 6-2,6-0 |
| ITF M25 Maribor | 2023/09/06 11:55 | Matei Cristian Onofrei v Daniel Paty | 3-6,3-6 |
| ITF M25 Maribor | 2023/08/30 12:00 | Alex Knaff v Matei Cristian Onofrei | 6-0,6-1 |
| ITF M25 Bacau | 2023/07/25 07:00 | Bogdan Pavel v Matei Cristian Onofrei | 6-2,6-2 |
| ITF M25 Bacau | 2023/07/24 07:00 | Matei Cristian Onofrei v Alexandru Cristian Dumitru | 6-1,4-6,10-5 |
| ITF M15 Monastir | 2023/09/24 08:30 | Thomas Braithwaite v Yudai Umeoka | 6-1,6-1 |
| ITF M15 Monastir | 2023/09/17 09:00 | Yudai Umeoka v Luca Hesselmann | 1-6,4-6 |
| ITF M25 Monastir | 2023/09/11 14:45 | Robin Bulant v Yudai Umeoka | 6-2,6-3 |
| ITF M25 Monastir | 2023/09/11 11:05 | Joris Hoogland v Yudai Umeoka | 6-7,6-3,8-10 |
| UTR Pro Miki | 2023/04/15 02:00 | Yudai Umeoka v Mao Takada | 6-2,6-7,0-1 |
| UTR Pro Miki | 2023/04/13 00:30 | Yudai Umeoka v Yuto Oki | 2-6,0-6 |
| UTR Pro Miki | 2023/04/12 06:23 | Yudai Umeoka v Ren Nakamura | 3-6,1-6 |
| UTR Pro Miki | 2023/04/11 03:30 | Yudai Umeoka v Ryotaro Taguchi | 2-6,1-6 |