2021 Slovak Open II – Singles
| Singles | |
|---|---|
| 2021 Slovak Open II | |
| Champion | Tallon Griekspoor | 
| Runner-up | Zsombor Piros | 
| Score | 6–3, 6–2 | 
Maximilian Marterer was the defending champion but lost in the quarterfinals to Stefano Travaglia.
Tallon Griekspoor won the title after defeating Zsombor Piros 6–3, 6–2 in the final.