# 2021 Nottingham Open – Men's singles

Dan Evans was the defending champion but lost in the quarterfinals to Denis Kudla.
Frances Tiafoe won the title after defeating Kudla 6–1, 6–3 in the final.

## Seeds

* Dan Evans (quarterfinals)
* Frances Tiafoe (champion)
* Andreas Seppi (quarterfinals)
* Kevin Anderson (quarterfinals)
* Mackenzie McDonald (first round)
* Denis Kudla (final)
* Damir Džumhur (first round)
* Kamil Majchrzak (semifinals)

## Draw
### Key

* 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

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 6 | Denis Kudla | 6 | 1 | 7$^8$ | | | | |
| 8 | Kamil Majchrzak | 4 | 6 | 6$^6$ | | | | |
| 8 | Kamil Majchrzak | 4 | 6 | 6$^6$ | 6 | Denis Kudla | 1 | 3 |
| | | | | | 2 | Frances Tiafoe | 6 | 6 |
| Q | Marius Copil | 3 | 2 | | 2 | Frances Tiafoe | 6 | 6 |
| 2 | Frances Tiafoe | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | D Evans | 4 | 7$^7$ | 7$^7$ | | | | | | | | | | | | | | | |
| | T Kokkinakis | 6 | 6$^1$ | 6$^5$ | 1/WC | D Evans | 7$^8$ | 7$^7$ | | | | | | | | | | | |
| Q | M Ebden | 6 | 6 | | Q | M Ebden | 6$^6$ | 6$^4$ | | | | | | | | | | | |
| WC | R Peniston | 4 | 4 | | | | | | | 1/WC | D Evans | 4 | 6 | 4 | | | | | |
| | A Bolt | 5 | 6 | 3 | | | | | | 6 | D Kudla | 6 | 1 | 6 | | | | | |
| | L Broady | 7 | 3 | 6 | | L Broady | 6 | 3 | 6$^2$ | | | | | | | | | | |
| | T Macháč | 3 | 6 | 4 | 6 | D Kudla | 3 | 6 | 7$^7$ | | | | | | | | | | |
| 6 | D Kudla | 6 | 4 | 6 | | | | | | | | | | | 6 | D Kudla | 6 | 1 | 7$^8$ |
| 3 | A Seppi | 7$^7$ | 6 | | | | | | | | | | | | 8 | K Majchrzak | 4 | 6 | 6$^6$ |
| | Zh Zhang | 6$^4$ | 2 | | 3 | A Seppi | 6 | 6$^4$ | 6 | | | | | | | | | | |
| | T Fabbiano | 6$^5$ | 6$^3$ | | | A Hoang | 4 | 7$^7$ | 2 | | | | | | | | | | |
| | A Hoang | 7$^7$ | 7$^7$ | | | | | | | 3 | A Seppi | 6 | 2 | 3 | | | | | |
| | M Polmans | 6$^{10}$ | 6 | 3 | | | | | | 8 | K Majchrzak | 4 | 6 | 6 | | | | | |
| Q | A Vukic | 7$^{12}$ | 4 | 6 | Q | A Vukic | 7 | 6$^{10}$ | 4 | | | | | | | | | | |
| | P Gunneswaran | 0 | 0$^r$ | | 8 | K Majchrzak | 5 | 7$^{12}$ | 6 | | | | | | | | | | |
| 8 | K Majchrzak | 6 | 0 | | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | D Džumhur | 4 | 6 | 1 | | | | | | | | | | | | | |
| Q | M Copil | 6 | 4 | 6 | Q | M Copil | 6 | 6 | | | | | | | | | |
| Q | B Gojo | 3 | 7$^{12}$ | 6$^6$ | | S Ofner | 4 | 4 | | | | | | | | | |
| | S Ofner | 6 | 6$^{10}$ | 7$^8$ | | | | | Q | M Copil | 7$^7$ | 7$^{11}$ | | | | | |
| | M Cressy | 4 | 7$^7$ | 3 | | | | | 4 | K Anderson | 6$^4$ | 6$^9$ | | | | | |
| | L Rosol | 6 | 6$^5$ | 6 | | L Rosol | 3 | 4 | | | | | | | | | |
| WC | J Clarke | 3 | 6$^0$ | | 4 | K Anderson | 6 | 6 | | | | | | | | | |
| 4 | K Anderson | 6 | 7$^7$ | | | | | | | | | | | Q | M Copil | 3 | 2 |
| 5 | M McDonald | 3 | 5 | | | | | | | | | | | 2 | F Tiafoe | 6 | 6 |
| | E Donskoy | 6 | 7 | | | E Donskoy | 7$^7$ | 7$^7$ | | | | | | | | | |
| | B Nakashima | 6 | 6 | | | B Nakashima | 6$^3$ | 6$^2$ | | | | | | | | | |
| | M Vilella Martínez | 3 | 2 | | | | | | | E Donskoy | 6$^4$ | 6 | 3 | | | | |
| | F Gaio | 2 | 3 | | | | | | 2 | F Tiafoe | 7$^7$ | 2 | 6 | | | | |
| | I Marchenko | 6 | 6 | | | I Marchenko | 5 | 6$^5$ | | | | | | | | | |
| | M-A Hüsler | 3 | 4 | | 2 | F Tiafoe | 7 | 7$^7$ | | | | | | | | | |
| 2 | F Tiafoe | 6 | 6 | | | | | | | | | | | | | | |