# 2021 Pekao Szczecin Open – Singles

Jozef Kovalík was the defending champion but chose not to defend his title.
Zdeněk Kolář won the title after defeating Kamil Majchrzak 7–6$^{(7–4)}$, 7–5 in the final.

## Seeds

* Albert Ramos Viñolas (first round)
* Pablo Andújar (second round)
* Pedro Martínez (withdrew)
* Marco Cecchinato (second round)
* Jiří Veselý (first round)
* Thiago Monteiro (second round)
* Roberto Carballés Baena (second round)
* Stefano Travaglia (second 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 |
| Q | Nicola Kuhn | 5 | 2$^r$ | | | |
| | Zdeněk Kolář | 7 | 2 | | | |
| | Zdeněk Kolář | 7 | 2 | Zdeněk Kolář | 7$^7$ | 7 |
| | | | | Kamil Majchrzak | 6$^4$ | 5 |
| | Yannick Hanfmann | 3 | 3 | Kamil Majchrzak | 6$^4$ | 5 |
| | Kamil Majchrzak | 6 | 6 | | | |

### 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 | Semifinals |
| 1/WC | A Ramos Viñolas | 6 | 4 | 4 | | | | | | | | | | | | |
| Q | N Kuhn | 1 | 6 | 6 | Q | N Kuhn | 6 | 6 | | | | | | | | |
| | D Petrović | 1 | 2 | | Q | A Rybakov | 2 | 2 | | | | | | | | |
| Q | A Rybakov | 6 | 6 | | | | | | Q | N Kuhn | 6 | 7 | | | | |
| | M Trungelliti | 4 | 6 | 6 | | | | | | M Trungelliti | 1 | 5 | | | | |
| LL | M Martineau | 6 | 4 | 3 | | M Trungelliti | 6 | 6 | | | | | | | | |
| | S Diez | 0 | 3 | | 6 | T Monteiro | 4 | 3 | | | | | | | | |
| 6 | T Monteiro | 6 | 6 | | | | | | | | | | Q | N Kuhn | 5 | 2$^r$ |
| LL | J de Jong | 7$^7$ | 3 | 7$^7$ | | | | | | | | | | Z Kolář | 7 | 2 |
| | J Lehečka | 6$^5$ | 6 | 6$^3$ | LL | J de Jong | 6 | 7$^7$ | | | | | | | | |
| WC | D Michalski | 3 | 6 | 1 | | T-S Kwiatkowski | 4 | 6$^1$ | | | | | | | | |
| | T-S Kwiatkowski | 6 | 4 | 6 | | | | | LL | J de Jong | 2 | 3 | | | | |
| Q | A Vatutin | 0 | 0$^r$ | | | | | | | Z Kolář | 6 | 6 | | | | |
| | J Clarke | 6 | 4 | | | J Clarke | 1 | 1 | | | | | | | | |
| | Z Kolář | 7$^9$ | 6 | | | Z Kolář | 6 | 6 | | | | | | | | |
| 5 | J Veselý | 6$^7$ | 3 | | | | | | | | | | | | | |

### 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 |
| 8 | S Travaglia | 3 | 6 | 6 | | | | | | | | | | | | |
| | S Nagal | 6 | 1 | 4 | 8 | S Travaglia | 6$^3$ | 6 | 2 | | | | | | | |
| WC | Paweł Ciaś | 6 | 4 | 6 | WC | P Ciaś | 7$^7$ | 3 | 6 | | | | | | | |
| | V Kopřiva | 2 | 6 | 4 | | | | | | WC | P Ciaś | 2 | 5 | | | |
| | Y Hanfmann | 3 | 6 | 6 | | | | | | | Y Hanfmann | 6 | 7 | | | |
| | H Gaston | 6 | 3 | 3 | | Y Hanfmann | 6 | 4 | 7$^7$ | | | | | | | |
| | D Novak | 3 | 3 | | 4 | M Cecchinato | 3 | 6 | 6$^2$ | | | | | | | |
| 4 | M Cecchinato | 6 | 6 | | | | | | | | | | | Y Hanfmann | 3 | 3 |
| 7 | R Carballés Baena | 6 | 7$^7$ | | | | | | | | | | | K Majchrzak | 6 | 6 |
| Q | V Sachko | 3 | 6$^5$ | | 7 | R Carballés Baena | 3 | 2 | | | | | | | | |
| | K Majchrzak | 6 | 7$^9$ | | | K Majchrzak | 6 | 6 | | | | | | | | |
| Alt | A Pellegrino | 3 | 6$^7$ | | | | | | | | K Majchrzak | 7$^7$ | 6 | | | |
| | T Daniel | 3 | 5 | | | | | | | | H Rune | 6$^5$ | 1 | | | |
| | H Rune | 6 | 7 | | | H Rune | 6 | 6 | | | | | | | | |
| | C Taberner | 6$^2$ | 4 | | 2 | P Andújar | 1 | 1 | | | | | | | | |
| 2 | P Andújar | 7$^7$ | 6 | | | | | | | | | | | | | |