# 2021 Zubr Cup – Singles

Grace Min was the defending champion, but chose to participate at the US Open Qualifying instead.
Linda Nosková won the title, defeating Alexandra Ignatik in the final, 6–7$^{(2–7)}$, 6–4, 6–3.

## Seeds

* Seone Mendez (first round)
* Diane Parry (first round)
* Anastasia Zakharova (first round)
* Ana Sofía Sánchez (first round)
* Gabriela Cé (first round)
* Alexandra Ignatik (final)
* Simona Waltert (quarterfinals)
* Tena Lukas (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 |
| WC | Monika Kilnarová | 3 | 2 | | | | | |
| 6 | Alexandra Ignatik | 6 | 6 | | | | | |
| 6 | Alexandra Ignatik | 6 | 6 | 6 | Alexandra Ignatik | 7$^7$ | 4 | 3 |
| | | | | WC | Linda Nosková | 6$^2$ | 6 | 6 |
| WC | Linda Nosková | 6 | 6 | WC | Linda Nosková | 6$^2$ | 6 | 6 |
| WC | Dominika Šalková | 3 | 2 | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | S Mendez | 3 | 4 | | | | | | | | | | | | | | |
| | J Malečková | 6 | 6 | | | J Malečková | 0 | 1 | | | | | | | | | |
| WC | M Kilnarová | 6 | 6 | | WC | M Kilnarová | 6 | 6 | | | | | | | | | |
| | L Salden | 2 | 3 | | | | | | | WC | M Kilnarová | 6 | 7 | | | | |
| | M Kolodziejová | 3 | 6 | 5 | | | | | | Q | S-h Park | 2 | 5 | | | | |
| | C Alves | 6 | 2 | 7 | | C Alves | 1 | 6$^5$ | | | | | | | | | |
| Q | S-h Park | 6 | 6 | | Q | S-h Park | 6 | 7$^7$ | | | | | | | | | |
| 8 | T Lukas | 3 | 0 | | | | | | | | | | | WC | M Kilnarová | 3 | 2 |
| 3 | A Zakharova | 4 | 4 | | | | | | | | | | | 6 | A Ignatik | 6 | 6 |
| | M Di Giuseppe | 6 | 6 | | | M Di Giuseppe | 2 | 6 | 3 | | | | | | | | |
| Q | T Smitková | 4 | 6 | 7$^7$ | Q | T Smitková | 6 | 4 | 6 | | | | | | | | |
| | P Özgen | 6 | 4 | 6$^5$ | | | | | | Q | T Smitková | 4 | 4 | | | | |
| Q | N Bartůňková | 6 | 6 | | | | | | | 6 | A Ignatik | 6 | 6 | | | | |
| PR | A Zaja | 3 | 4 | | Q | N Bartůňková | | | | | | | | | | | |
| Q | M Matsuda | 2 | 1 | | 6 | A Ignatik | w/o | | | | | | | | | | |
| 6 | A Ignatik | 6 | 6 | | | | | | | | | | | | | | |

### Bottom 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | S Waltert | 6 | 6 | | | | | | | | | | | | | | |
| Q | A Ramé | 3 | 3 | | 7 | S Waltert | 7 | 4 | 6 | | | | | | | | |
| | D Vismane | 6 | 6 | | | D Vismane | 5 | 6 | 2 | | | | | | | | |
| Q | T Mihalíková | 3 | 2 | | | | | | | 7 | S Waltert | 3 | 3 | | | | |
| WC | L Nosková | 5 | 6 | 6 | | | | | | WC | L Nosková | 6 | 6 | | | | |
| | A Hartono | 7 | 3 | 3 | WC | L Nosková | 6 | 6 | | | | | | | | | |
| | S-j Jang | 6 | 6 | | | S-j Jang | 2 | 3 | | | | | | | | | |
| 4 | AS Sánchez | 2 | 1 | | | | | | | | | | | WC | L Nosková | 6 | 6 |
| 5 | G Cé | 7 | 6$^6$ | 1 | | | | | | | | | | WC | D Šalková | 3 | 2 |
| Q | A Gámiz | 5 | 7$^8$ | 6 | Q | A Gámiz | 6$^4$ | 4 | | | | | | | | | |
| WC | D Šalková | 7$^7$ | 6 | | WC | D Šalková | 7$^7$ | 6 | | | | | | | | | |
| SE | A Sisková | 6$^3$ | 2 | | | | | | | WC | D Šalková | 7 | 6 | | | | |
| Q | SB Grey | 4 | 6 | 6 | | | | | | LL | S Bejlek | 5 | 1 | | | | |
| WC | D Viďmanová | 6 | 4 | 3 | Q | SB Grey | 6$^5$ | 4 | | | | | | | | | |
| LL | S Bejlek | 6 | 6 | | LL | S Bejlek | 7$^7$ | 6 | | | | | | | | | |
| 2 | D Parry | 2 | 2 | | | | | | | | | | | | | | |