Defending champion Shingo Kunieda[1] defeated Alfie Hewett in the final, 6–1, 6–4 to win the men's singles wheelchair tennis title at the 2021 US Open.[citation needed] It was his eighth US Open singles title and 25th major singles title overall.
| Wheelchair men's singles | |
|---|---|
| 2021 US Open | |
| Champion |  Shingo Kunieda |
| Runner-up |  Alfie Hewett |
| Score | 6–1, 6–4 |
Seeds edit
Shingo Kunieda (champion)
Alfie Hewett (final)
Draw edit
Key edit
- Q = Qualifier
- WC = Wild card
- LL = Lucky loser
- Alt = Alternate
- SE = Special exempt
- PR = Protected ranking
- ITF = ITF entry
- JE = Junior exempt
- w/o = Walkover
- r = Retired
- d = Defaulted
- SR = Special ranking
Finals edit
| Quarterfinals | Semifinals | Final | ||||||||||||||||||
| 1 | Shingo Kunieda
| 6 | 6 | |||||||||||||||||
| WC |  Casey Ratzlaff
| 1 | 0 | |||||||||||||||||
| 1 | Shingo Kunieda
| 4 | 6 | 6 | ||||||||||||||||
| Gordon Reid
| 6 | 4 | 2 | |||||||||||||||||
 Tom Egberink
| 1 | 4 | ||||||||||||||||||
| Gordon Reid
| 6 | 6 | ||||||||||||||||||
| 1 | Shingo Kunieda
| 6 | 6 | |||||||||||||||||
| 2 | Alfie Hewett
| 1 | 4 | |||||||||||||||||
 Stéphane Houdet
| 4 | 3 | ||||||||||||||||||
 Gustavo Fernández
| 6 | 6 | ||||||||||||||||||
| Gustavo Fernández
| 2 | 4 | ||||||||||||||||||
| 2 | Alfie Hewett
| 6 | 6 | |||||||||||||||||
| Nicolas Peifer
| 5 | 2 | ||||||||||||||||||
| 2 | Alfie Hewett
| 7 | 6 | |||||||||||||||||