Stadium: Center Court 7 Round: 25 Ground: Hardcourt indoor
| ITF M15 Ithaca | 2021/11/04 13:55 | Felix Corwin v Alex Knaff | 5-7,7-6,7-5 |
| ITF M15 Ithaca | 2021/11/03 15:30 | Radu Mihai Papoe v Alex Knaff | 6-4,3-6,0-6 |
| ITF M15 Tallahassee | 2021/10/27 13:55 | Alex Knaff v Sho Shimabukuro | 4-6,6-4,4-6 |
| ITF M15 Tallahassee | 2021/10/26 13:00 | Blu Baker v Alex Knaff | 6-7,5-7 |
| ITF M15 Tallahassee | 2021/10/25 13:00 | Alex Knaff v Matthew Dellavedova | 6-4,6-2 |
| ITF M25 Setubal | 2021/10/05 10:00 | Arthur Cazaux v Alex Knaff | 6-1,6-7,10-5 |
| ITF M25 Setubal | 2021/10/04 10:00 | Aditya Katticaren v Alex Knaff | 0-6,0-6 |
| ITF M15 Forbach | 2021/09/27 13:30 | Millen Hurrion v Alex Knaff | 6-3,6-7,10-3 |
| Challenger Bergamo | 2021/10/31 10:25 | Mattia Bellucci v Nerman Fatic | 6-7,4-6 |
| ITF M15 Selva Gardena | 2021/10/29 12:00 | Samuel Vincent Ruggeri v Mattia Bellucci | 7-6,6-4 |
| ITF M15 Selva Gardena | 2021/10/28 08:55 | Luca Potenza v Mattia Bellucci | 2-6,4-6 |
| ITF M15 Selva Gardena | 2021/10/27 08:00 | Kai Lemstra v Mattia Bellucci | 3-6,3-6 |
| ITF M15 Selva Gardena | 2021/10/26 09:20 | Leopold Zima v Mattia Bellucci | 4-6,6-7 |
| ITF M25 Toulouse | 2021/10/22 10:00 | Li Tu v Mattia Bellucci | 6-4,6-4 |
| ITF M25 Toulouse | 2021/10/21 10:00 | Giovanni Mpetshi Perricard v Mattia Bellucci | 3-6,3-6 |
| ITF M25 Toulouse | 2021/10/20 12:00 | Mattia Bellucci v Gijs Brouwer | 7-6,6-4 |