Stadium: Court 4 Round: 62 Ground: Clay
| ITF M15 Satu Mare | 2023/09/10 07:00 | Matei Cristian Onofrei v David Gabor | 6-2,6-0 |
| Maribor, Singles Main, M-ITF-SLO-06A | 2023/09/06 11:55 | Matei Cristian Onofrei v Daniel Paty | 3-6,3-6 |
| Maribor, Singles Main, M-ITF-SLO-06A | 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 |
| Iasi, Romania | 2023/07/09 07:30 | Matei Cristian Onofrei v Juan Bautista Otegui | 2-6,1-6 |
| ITF M25 Brasov | 2023/07/03 10:25 | Cazacu, Dragos Nicolae v Matei Cristian Onofrei | 7-5,5-7,6-3 |
| ITF M15 Cluj Napoca | 2023/06/19 12:55 | Matei Cristian Onofrei v Roncalli, Simone | 2-6,5-7 |
| ITF M15 Budapest | 2023/09/03 12:30 | Adam Jilly v Csongor Hejjas | 6-1,6-4 |
| Maribor, Singles Main, M-ITF-SLO-06A | 2023/08/29 09:30 | Csongor Hejjas v Jan Dimitrijevic | 3-6,4-6 |
| Maribor, Singles Main, M-ITF-SLO-06A | 2023/08/28 10:30 | Csongor Hejjas v Mateo Martinovic | 6-3,6-3 |
| ITF M25 Bielsko Biala | 2023/08/14 10:30 | Borys Zgola v Csongor Hejjas | 6-2,6-3 |
| ITF M25 Osijek | 2023/08/06 10:00 | Dudun, Igor v Csongor Hejjas | 6-4,6-2 |
| ITF M15 Novi Sad | 2023/07/31 07:00 | Gagliardo, Lorenzo v Csongor Hejjas | 6-0,6-2 |
| ITF M25 Brasov | 2023/07/03 06:30 | Stefan A Andreescu v Csongor Hejjas | 6-0,6-3 |
| ITF M25 Brasov | 2023/07/02 06:30 | Csongor Hejjas v Alexandru Luca | 6-3,6-0 |