# 2021 BNP Paribas Polish Cup – Singles

This was the first edition of the tournament.
Camilo Ugo Carabelli won the title after defeating Nino Serdarušić 6–4, 6–2 in the final.

## Seeds

* Daniel Altmaier (second round)
* Jozef Kovalík (semifinals)
* Lukáš Klein (quarterfinals)
* Tristan Lamasine (second round)
* Duje Ajduković (first round)
* Nicolás Jarry (quarterfinals)
* Vitaliy Sachko (first round)
* Mirza Bašić (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 | Semifinals | Final | Final | Final |
| | Camilo Ugo Carabelli | 3 | 6 | 7$^7$ | | | |
| | Javier Barranco Cosano | 6 | 4 | 6$^0$ | | | |
| | Javier Barranco Cosano | 6 | 4 | 6$^0$ | Camilo Ugo Carabelli | 6 | 6 |
| | | | | | Nino Serdarušić | 4 | 2 |
| | Nino Serdarušić | 7$^7$ | 7$^8$ | | Nino Serdarušić | 4 | 2 |
| 2 | Jozef Kovalík | 6$^3$ | 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 |
| 1 | D Altmaier | 0 | | | | | | | | | | | | | | | | |
| WC | L Borg | 2$^r$ | | | 1 | D Altmaier | 4 | 6$^2$ | | | | | | | | | | |
| | C Ugo Carabelli | 6 | 6 | | | C Ugo Carabelli | 6 | 7$^7$ | | | | | | | | | | |
| WC | M Kaśnikowski | 2 | 4 | | | | | | | | C Ugo Carabelli | 6 | 6 | | | | | |
| | N Kicker | 2 | 7 | 6 | | | | | | 6 | N Jarry | 2 | 2 | | | | | |
| | A Erler | 6 | 5 | 3 | | N Kicker | 6$^1$ | 6 | 4 | | | | | | | | | |
| | A Menéndez Maceiras | 5 | 6 | 1 | 6 | N Jarry | 7$^7$ | 4 | 6 | | | | | | | | | |
| 6 | N Jarry | 7 | 4 | 6 | | | | | | | | | | | C Ugo Carabelli | 3 | 6 | 7$^7$ |
| 3 | L Klein | 6 | 3 | 6 | | | | | | | | | | | J Barranco Cosano | 6 | 4 | 6$^0$ |
| | J Lenz | 1 | 6 | 3 | 3 | L Klein | 7 | 6 | | | | | | | | | | |
| | A Kuznetsov | 6 | 6 | | | A Kuznetsov | 5 | 1 | | | | | | | | | | |
| | V Durasovic | 0 | 2 | | | | | | | 3 | L Klein | 6 | 3 | 4 | | | | |
| | L Catarina | 3 | 5 | | | | | | | | J Barranco Cosano | 3 | 6 | 6 | | | | |
| | N Borges | 6 | 7 | | | N Borges | 6 | 2 | 3 | | | | | | | | | |
| | J Barranco Cosano | 6 | 6 | | | J Barranco Cosano | 3 | 6 | 6 | | | | | | | | | |
| 8 | M Bašić | 3 | 1 | | | | | | | | | | | | | | | |

### 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 | V Sachko | 6 | 6$^4$ | 4 | | | | | | | | | | | | | |
| | M Vrbenský | 2 | 7$^7$ | 6 | | M Vrbenský | 6 | 4 | 6 | | | | | | | | |
| PR | Jeroen Vanneste | 6 | 2 | 7 | PR | J Vanneste | 0 | 6 | 3 | | | | | | | | |
| Q | A Shevchenko | 3 | 6 | 5 | | | | | | | M Vrbenský | 6$^1$ | 2 | | | | |
| Q | D Michalski | 3 | 4 | | | | | | | | N Serdarušić | 7$^7$ | 6 | | | | |
| | N Serdarušić | 6 | 6 | | | N Serdarušić | 6 | 3 | 7 | | | | | | | | |
| Q | J Zieliński | 2 | 2 | | 4 | T Lamasine | 1 | 6 | 5 | | | | | | | | |
| 4 | T Lamasine | 6 | 6 | | | | | | | | | | | | N Serdarušić | 7$^7$ | 7$^8$ |
| 5 | D Ajduković | 3 | 6 | 1 | | | | | | | | | | 2 | J Kovalík | 6$^3$ | 6$^6$ |
| | L Miedler | 6 | 3 | 6 | | L Miedler | 7 | 6 | | | | | | | | | |
| WC | S Kielan | 7 | 6 | | WC | S Kielan | 5 | 4 | | | | | | | | | |
| | G Oliveira | 5 | 0 | | | | | | | | L Miedler | 4 | 4 | | | | |
| | E Furness | 6 | 2 | 6 | | | | | | 2 | J Kovalík | 6 | 6 | | | | |
| | O Luz | 4 | 6 | 3 | | E Furness | 2 | 5 | | | | | | | | | |
| Q | J Nikles | 3 | 4 | | 2 | J Kovalík | 6 | 7 | | | | | | | | | |
| 2 | J Kovalík | 6 | 6 | | | | | | | | | | | | | | |