Stadium: Court 4 Round: 25 Ground: Clay
| Challenger Grodzisk Mazowiecki | 2023/08/14 10:25 | Jiri Vesely v Alex Knaff | 7-5,6-4 |
| Challenger Grodzisk Mazowiecki | 2023/08/13 13:20 | Szymon Kielan v Alex Knaff | 3-6,0-6 |
| ITF M15 Raanana | 2023/08/04 10:25 | Amit Vales v Alex Knaff | 6-4,6-2 |
| ITF M15 Raanana | 2023/08/03 07:25 | Lior Goldenberg v Alex Knaff | 3-6,3-6 |
| ITF M15 Raanana | 2023/08/02 07:30 | Ron Ellouck v Alex Knaff | 1-6,2-6 |
| ITF M15 Raanana | 2023/08/01 07:00 | Luca Fantini v Alex Knaff | 3-6,6-7 |
| ITF M25 Esch/Alzette | 2023/07/23 13:00 | Alex Knaff v Marlon Vankan | 6-3,6-1 |
| ITF M25 Esch/Alzette | 2023/07/22 14:25 | Alex Knaff v Mikalai Haliak | 7-6,6-4 |
| 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 |
| Challenger Iasi | 2023/07/09 07:30 | Matei Cristian Onofrei v Juan Bautista Otegui | 2-6,1-6 |
| ITF M25 Brasov | 2023/07/03 10:25 | Dragos N Cazacu v Matei Cristian Onofrei | 7-5,5-7,6-3 |
| ITF M15 Cluj Napoca | 2023/06/19 12:55 | Matei Cristian Onofrei v Simone Roncalli | 2-6,5-7 |
| ITF M25 Grasse | 2023/06/11 09:15 | Matthieu Bolot v Matei Cristian Onofrei | 6-1,6-0 |
| ITF M15 Constanta | 2023/05/28 06:00 | Thiago Cigarran v Matei Cristian Onofrei | 6-1,7-6 |
| ITF M15 Bucharest | 2023/05/22 09:00 | Matei Cristian Onofrei v Lior Goldenberg | 4-6,1-6 |