Stadium: Court 8 Round: 54 Ground: Hardcourt indoor
| ITF M15 East Lansing | 2021/11/20 16:55 | Alex Knaff v Gabriel Diallo | 2-6,7-6,2-6 |
| ITF M15 East Lansing | 2021/11/19 17:55 | Alex Knaff v Colin Sinclair | 7-6,5-7,6-2 |
| ITF M15 East Lansing | 2021/11/18 20:00 | Ronald Hohmann v Alex Knaff | 3-6,4-6 |
| ITF M15 East Lansing | 2021/11/17 18:00 | William Bushamuka v Alex Knaff | 2-6,6-7 |
| ITF M15 East Lansing | 2021/11/16 16:00 | Joshua Sheehy v Alex Knaff | 3-6,2-6 |
| 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 Monastir | 2021/09/21 09:00 | Alessio Zanotti v Christoph Negritu | 6-4,4-6,2-6 |
| ITF M15 Monastir | 2021/09/15 09:10 | Alessio Zanotti v Mattia Bellucci | 4-6,6-7 |
| ITF M15 Monastir | 2021/09/14 08:00 | Alessio Zanotti v Mohamed Amin Oueslati | 6-0,6-3 |
| ITF M15 Chornomorsk | 2021/08/30 10:30 | Denis Yevseyev v Alessio Zanotti | 6-1,6-3 |
| ITF M15 Chornomorsk | 2021/08/30 07:00 | Alessio Zanotti v Oleksandr Bielinskyi | 6-2,6-2 |
| ITF M25 Lesa | 2021/08/22 12:10 | Pietro Marino v Alessio Zanotti | 4-6,6-3,11-9 |
| Challenger Verona | 2021/08/15 10:00 | Flavio Cobolli v Alessio Zanotti | 6-1,6-4 |
| ITF M25 Bolzano | 2021/08/02 16:25 | Augusto Virgili v Alessio Zanotti | 7-5,6-3 |