| UTR Pro Tennis Series California | 2022/05/15 21:30 | Jeffrey Fradkin v Alex Knaff | 1-6,1-6 |
| ITF M15 Vero Beach | 2022/04/28 17:15 | Alex Knaff v Ethan Quinn | 3-6,2-6 |
| ITF M15 Vero Beach | 2022/04/27 16:00 | Ricardo Rodriguez-Pace v Alex Knaff | 7-5,4-6,2-6 |
| Challenger Tallahassee | 2022/04/17 18:45 | Alex Knaff v Cristian Rodriguez | 2-6,3-6 |
| ITF M15 Sunrise | 2022/04/12 15:00 | Alex Knaff v Joao Victor C Loureiro | 6-3,2-6,7-10 |
| ITF M15 Sunrise | 2022/04/11 15:00 | Alex Knaff v Christian Lakoseljac | 6-4,5-7,10-6 |
| ITF M15 Monastir | 2022/03/25 10:20 | Alex Knaff v Maik Steiner | 1-6,4-6 |
| ITF M15 Monastir | 2022/03/24 08:00 | Arnaud Bovy v Alex Knaff | 3-6,7-5,5-7 |
| UTR Pro Tennis Series California | 2022/05/15 20:00 | Sebastian Nothhaft v Yassine Smiej | 2-6,1-5 |
| ITF M15 Hong Kong | 2020/01/08 07:00 | Runhao Hua v Sebastian Nothhaft | 6-4,6-4 |