ATP 250 · 2021-09-20 · draw of 32
Nur-Sultan 2021
HardFinal
| 🇰🇷 Soonwoo Kwon | d. | 🇦🇺 James Duckworth | 7-6(6) 6-3 | H2H |
Semifinals
| 🇦🇺 James Duckworth | d. | 🇧🇾 Ilya Ivashka | 6-3 7-6(4) | H2H |
| 🇰🇷 Soonwoo Kwon | d. | 🇰🇿 Alexander Bublik | 3-6 7-5 6-3 | H2H |
Quarterfinals
| 🇧🇾 Ilya Ivashka | d. | 🇫🇮 Emil Ruusuvuori | 4-6 6-4 6-1 | H2H |
| 🇦🇺 James Duckworth | d. | 🇦🇺 John Millman | 6-4 6-4 | H2H |
| 🇰🇷 Soonwoo Kwon | d. | 🇷🇸 Laslo Djere | 7-6(4) 2-6 6-0 | H2H |
| 🇰🇿 Alexander Bublik | d. | 🇪🇸 Carlos Taberner | 6-3 6-4 | H2H |
Round of 16
| 🇫🇮 Emil Ruusuvuori | d. | 🇷🇺 Aslan Karatsev | 7-6(6) 6-4 | H2H |
| 🇧🇾 Ilya Ivashka | d. | 🇰🇿 Timofey Skatov | 6-2 6-3 | H2H |
| 🇦🇺 James Duckworth | d. | 🇷🇸 Filip Krajinovic | 7-6(2) 6-3 | H2H |
| 🇦🇺 John Millman | d. | 🇪🇸 Jaume Munar | 6-4 6-7(5) 7-5 | H2H |
| 🇷🇸 Laslo Djere | d. | 🇮🇹 Lorenzo Musetti | 6-4 6-7(3) 6-4 | H2H |
| 🇰🇷 Soonwoo Kwon | d. | 🇷🇸 Dusan Lajovic | 7-5 6-4 | H2H |
| 🇪🇸 Carlos Taberner | d. | 🇧🇾 Egor Gerasimov | 5-7 7-6(5) 7-5 | H2H |
| 🇰🇿 Alexander Bublik | d. | 🇷🇸 Miomir Kecmanovic | 2-6 6-3 7-5 | H2H |
Round of 32
| 🇫🇮 Emil Ruusuvuori | d. | 🇫🇷 Benjamin Bonzi | 6-2 RET | H2H |
| 🇰🇿 Timofey Skatov | d. | 🇮🇹 Andreas Seppi | 7-6(3) 4-6 6-1 | H2H |
| 🇧🇾 Ilya Ivashka | d. | 🇸🇪 Elias Ymer | 6-2 6-4 | H2H |
| 🇦🇺 James Duckworth | d. | 🇰🇿 Mikhail Kukushkin | 7-6(3) 6-1 | H2H |
| 🇪🇸 Jaume Munar | d. | 🇨🇿 Jiri Vesely | 6-3 7-6(6) | H2H |
| 🇦🇺 John Millman | d. | 🇰🇿 Dmitry Popko | 3-6 6-1 6-4 | H2H |
| 🇷🇸 Laslo Djere | d. | 🇨🇴 Daniel Elahi Galan | 6-4 3-6 6-4 | H2H |
| 🇮🇹 Lorenzo Musetti | d. | 🇦🇺 Marc Polmans | 6-4 2-6 6-4 | H2H |
| 🇰🇷 Soonwoo Kwon | d. | 🇷🇺 Evgeny Donskoy | 6-4 6-3 | H2H |
| 🇧🇾 Egor Gerasimov | d. | 🇫🇷 Benoit Paire | 7-5 6-4 | H2H |
| 🇪🇸 Carlos Taberner | d. | 🇱🇹 Ricardas Berankis | 7-5 6-4 | H2H |
| 🇷🇸 Miomir Kecmanovic | d. | 🇪🇸 Fernando Verdasco | 6-4 6-2 | H2H |