Astana Open · ATP
Astana Open 2021
ATP 250Hard indoorAstana, Kazakhstan19 September – 26 September 2021Prize money: 541,800 USD39 matchesAltitude: 357 mCourt: Fast
Champion Soon Woo Kwon · Final: 4-6 6-4 6-1
Final rounds
| Final | Soon Woo Kwon vs James Duckworth | 7-6(6) 6-3 |
| Semifinal | Soon Woo Kwon vs Alexander Bublik | 3-6 7-5 6-3 |
| Semifinal | James Duckworth vs Ilya Ivashka | 6-3 7-6(4) |
| Quarterfinal | Alexander Bublik vs Carlos Taberner | 6-3 6-4 |
| Quarterfinal | Soon Woo Kwon vs Laslo Djere | 7-6(4) 2-6 6-0 |
| Quarterfinal | James Duckworth vs John Millman | 6-4 6-4 |
| Quarterfinal | Ilya Ivashka vs Emil Ruusuvuori | 4-6 6-4 6-1 |
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