# 2021 Boar's Head Resort Women's Open – Singles

Whitney Osuigwe was the defending champion, having won the last edition in 2019 but retired in the first round against Arianne Hartono.
Claire Liu won the title after Wang Xinyu retired in the final at 3–6, 6–4, 4–1.

## Seeds

* Madison Brengle (first round, retired)
* Mayar Sherif (second round)
* Kristie Ahn (first round)
* Irina Bara (second round)
* Olga Govortsova (first round)
* Wang Xinyu (final, retired)
* Harriet Dart (quarterfinals, withdrew)
* Magdalena Fręch (first round)

## 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 | Final | Final | Final | Final | Final |
| | Sachia Vickery | 3 | 3 | | | | | |
| | Claire Liu | 6 | 6 | | | | | |
| | Claire Liu | 6 | 6 | | Claire Liu | 3 | 6 | 4 |
| | | | | 6 | Wang Xinyu | 6 | 4 | 1$^r$ |
| Q | Katie Boulter | 3 | 0$^r$ | 6 | Wang Xinyu | 6 | 4 | 1$^r$ |
| 6 | Wang Xinyu | 6 | 0 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 1 | M Brengle | 5 | 6 | 5$^r$ | | | | | | | | | | | |
| | Ar Rodionova | 7 | 4 | 6 | | Ar Rodionova | 2 | 4 | | | | | | | |
| | A Kiick | 7 | 6 | | | A Kiick | 6 | 6 | | | | | | | |
| Q | G Min | 5 | 4 | | | | | | | A Kiick | 3 | 5 | | | |
| | W Osuigwe | 4 | 6 | 0$^r$ | | | | | | S Vickery | 6 | 7 | | | |
| Q | A Hartono | 6 | 4 | 4 | Q | A Hartono | 2 | 4 | | | | | | | |
| | S Vickery | 4 | 6 | 6 | | S Vickery | 6 | 6 | | | | | | | |
| 8 | M Fręch | 6 | 2 | 3 | | | | | | | | | S Vickery | 3 | 3 |
| 4 | I Bara | 7 | 7 | | | | | | | | | | C Liu | 6 | 6 |
| | G Talabă | 5 | 5 | | 4 | I Bara | 2 | 0 | | | | | | | |
| Q | H Chang | 1 | 1 | | | C Liu | 6 | 6 | | | | | | | |
| | C Liu | 6 | 6 | | | | | | | C Liu | w/o | | | | |
| Q | A Sutjiadi | 6 | 4 | 7$^7$ | | | | | 7 | H Dart | | | | | |
| | R Anderson | 3 | 6 | 6$^5$ | Q | A Sutjiadi | 3 | 4 | | | | | | | |
| | V Cepede Royg | 6 | 3 | 5 | 7 | H Dart | 6 | 6 | | | | | | | |
| 7 | H Dart | 3 | 6 | 7 | | | | | | | | | | | |

### 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 |
| 8 | O Govortsova | 4 | 3 | | | | | | | | | | | | | | |
| WC | A Parks | 6 | 6 | | WC | A Parks | 6 | 6 | | | | | | | | | |
| | M Hibi | 4 | 6$^2$ | | Q | U Eikeri | 4 | 1 | | | | | | | | | |
| Q | U Eikeri | 6 | 7$^7$ | | | | | | WC | A Parks | 2 | 3 | | | | | |
| | C Paquet | 6$^5$ | 0$^r$ | | | | | | Q | K Boulter | 6 | 6 | | | | | |
| Q | K Boulter | 7$^7$ | 2 | | Q | K Boulter | 6 | 6 | | | | | | | | | |
| Q | M Mateas | 3 | 6 | 6 | Q | M Mateas | 4 | 0 | | | | | | | | | |
| 3 | K Ahn | 6 | 4 | 3 | | | | | | | | | | Q | K Boulter | 3 | 0$^r$ |
| 6 | Xin Wang | 6 | 6 | | | | | | | | | | | 6 | Xin Wang | 6 | 0 |
| | UM Arconada | 4 | 2 | | 6 | Xin Wang | 6 | 6 | | | | | | | | | |
| WC | K Volynets | 6 | 1 | 6 | WC | K Volynets | 1 | 3 | | | | | | | | | |
| | D Lao | 2 | 6 | 4 | | | | | 6 | Xin Wang | 6 | 3 | 6 | | | | |
| | H Baptiste | 6 | 6 | | | | | | | H Baptiste | 1 | 6 | 3 | | | | |
| Q | J Loeb | 2 | 2 | | | H Baptiste | 6 | 7$^7$ | | | | | | | | | |
| WC | E Navarro | 4 | 1 | | 2 | M Sherif | 3 | 6$^4$ | | | | | | | | | |
| 2 | M Sherif | 6 | 6 | | | | | | | | | | | | | | |