Ostrava challenger · ATP
Ostrava challenger 2021
ChallengerClayOstrava, Czechia25 April – 2 May 2021Prize money: 44,820 EUR43 matchesAltitude: 217 mCourt: Slow
Champion Benjamin Bonzi · Final: 6-4 6-2
Final rounds
| Final | Benjamin Bonzi vs Renzo Olivo | 6-4 6-4 |
| Semifinal | Renzo Olivo vs Arthur Rinderknech | 5-4 ret. |
| Semifinal | Benjamin Bonzi vs Elias Ymer | 6-3 4-6 7-6(5) |
| Quarterfinal | Renzo Olivo vs Tomas Martin Etcheverry | 6-4 6-4 |
| Quarterfinal | Arthur Rinderknech vs Lukas Klein | 3-6 6-3 6-4 |
| Quarterfinal | Elias Ymer vs Alex Molcan | 7-5 6-3 |
| Quarterfinal | Benjamin Bonzi vs Marc Polmans | 6-4 6-2 |
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