Stadium: Court 6 Round: 26 Ground: Clay
| ITF USA F40 | 2017/12/07 16:00 | Alex Knaff v Jacob Dunbar | 2-6,4-6 |
| ITF USA F40 | 2017/12/06 20:30 | Austin Krajicek v Alex Knaff | 6-4,1-6,4-6 |
| ITF USA F37 | 2017/11/14 16:00 | Alex Knaff v Fabrizio Ornago | 1-6,5-7 |
| ITF USA F37 | 2017/11/12 17:30 | Juan I Cabrera v Alex Knaff | 1-6,7-5,6-7 |
| ITF Belgium F8 Qual | 2017/08/07 10:40 | Nikolas Walterscheid-Tukic v Alex Knaff | 6-4,6-3 |
| ITF Belgium F8 Qual | 2017/08/06 08:00 | Raphael Calzi v Alex Knaff | 2-6,0-6 |
| ITF Morocco F3 | 2017/07/30 09:30 | Hugo Daubias v Alex Knaff | 6-3,6-1 |
| ITF Morocco F3 | 2017/07/29 09:00 | Yassir Kilani v Alex Knaff | 3-6,6-3,5-7 |
| ITF Germany F3 | 2018/01/31 10:00 | Christoph Negritu v Mats Rosenkranz | 4-6,6-3,1-6 |
| ITF Germany F3 Qual | 2018/01/29 16:40 | Christoph Negritu v Leon Hoeveler | 6-3,6-0 |
| ITF Germany F3 Qual | 2018/01/28 18:00 | Christoph Negritu v Jim Walder | 6-3,7-6 |
| ITF Germany F2 | 2018/01/24 16:20 | Christoph Negritu v Sadio Doumbia | 6-7,1-6 |
| ITF Germany F1 | 2018/01/11 14:10 | Christoph Negritu v Gijs Brouwer | 6-2,7-6 |
| ITF Germany F1 | 2018/01/09 11:00 | Duje Kekez v Christoph Negritu | 3-6,3-6 |
| ITF Czech Republic F9 | 2017/11/08 11:50 | Petr Nouza v Christoph Negritu | 6-3,6-3 |
| ITF Germany F16 | 2017/10/25 14:30 | Christoph Negritu v Elmar Ejupovic | 4-6,1-6 |