Nur-Sultan challenger · ATP
Nur-Sultan challenger 2021
ChallengerHard indoorNur-Sultan, Kazakhstan21 February – 28 February 2021Prize money: 104,160 USD43 matchesAltitude: 357 mCourt: Slow
Champion Mackenzie McDonald · Final: 6-4 6-3
Final rounds
| Final | Mackenzie McDonald vs Jurij Rodionov | 6-1 6-2 |
| Semifinal | Jurij Rodionov vs Prajnesh Gunneswaran | 6-2 3-6 6-3 |
| Semifinal | Mackenzie McDonald vs Henri Laaksonen | 6-2 6-1 |
| Quarterfinal | Jurij Rodionov vs Tomas Machac | 6-2 6-3 |
| Quarterfinal | Prajnesh Gunneswaran vs Martin Klizan | 6-3 4-6 6-4 |
| Quarterfinal | Mackenzie McDonald vs Frederico Ferreira Silva | 6-4 3-6 7-6(3) |
| Quarterfinal | Henri Laaksonen vs Kacper Zuk | 6-4 6-3 |
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