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| Mar 14 • 11:00 | Kei Nishikori |  | - |  | Reilly Opelka | 2 | : | 1 |
| Mar 14 • 11:00 | Jérémy Chardy |  | - |  | Albert Ramos-Viñolas | 2 | : | 1 |
| Mar 14 • 12:30 | Aslan Karatsev |  | - |  | Egor Gerasimov | 2 | : | 0 |
| Mar 14 • 12:30 | Yoshihito Nishioka | | - |  | Alexander Bublik | 0 | : | 2 |
| Mar 14 • 16:00 | Malek Jaziri |  | - | | Jo-Wilfried Tsonga | 0 | : | 0 |
| Mar 14 • 17:20 | Alexei Popyrin |  | - |  | Dennis Novak | 2 | : | 0 |
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| Mar 15 • 10:00 | Alejandro Davidovich Fokina | | - |  | Radu Albot | 2 | : | 0 |
| Mar 15 • 10:00 | Jan-Lennard Struff |  | - | | Mikhail Kukushkin | 2 | : | 0 |
| Mar 15 • 11:00 | Bernabe Zapata Miralles | | - | | John Millman | 2 | : | 0 |
| Mar 15 • 11:40 | Christopher O'Connell | | - |  | Lloyd Harris | 1 | : | 2 |
| Mar 15 • 11:40 | Yuki Bhambri |  | - |  | Aljaž Bedene | 1 | : | 2 |
| Mar 15 • 13:00 | Richard Gasquet | | - |  | Marco Cecchinato | 2 | : | 0 |
| Mar 15 • 13:00 | Emil Ruusuvuori |  | - | | Jordan Thompson | 2 | : | 0 |
| Mar 15 • 17:30 | Vasek Pospisil |  | - |  | Márton Fucsovics | 1 | : | 2 |
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| Mar 15 • 16:00 | Alex De Minaur | | - | | Jérémy Chardy | 1 | : | 2 |
| Mar 16 • 10:00 | Richard Gasquet | | - |  | Hubert Hurkacz | 0 | : | 2 |
| Mar 16 • 10:00 | Lorenzo Sonego | | - | | Bernabe Zapata Miralles | 2 | : | 0 |
| Mar 16 • 10:00 | Aslan Karatsev | | - |  | Daniel Evans | 2 | : | 1 |
| Mar 16 • 11:00 | Denis Shapovalov | | - | | Jan-Lennard Struff | 2 | : | 0 |
| Mar 16 • 11:30 | Alexei Popyrin | | - | | Karen Khachanov | 1 | : | 2 |
| Mar 16 • 11:30 | Jannik Sinner | | - | | Alexander Bublik | 2 | : | 1 |
| Mar 16 • 11:30 | Malek Jaziri | | - |  | Dušan Lajović | 0 | : | 2 |
| Mar 16 • 13:00 | Lorenzo Giustino | | - | | Aljaž Bedene | 0 | : | 2 |
| Mar 16 • 13:00 | Matthew Ebden | | - | | Roberto Bautista-Agut | 0 | : | 0 |
| Mar 16 • 13:00 | Pablo Carreño Busta | | - | | Márton Fucsovics | 1 | : | 2 |
| Mar 16 • 13:00 | Emil Ruusuvuori | | - | | Andrey Rublev | 0 | : | 2 |
| Mar 16 • 15:30 | Taylor Harry Fritz | | - |  | Nikoloz Basilashvili | 2 | : | 1 |
| Mar 16 • 16:00 | Kei Nishikori | | - |  | David Goffin | 2 | : | 0 |
| Mar 16 • 17:20 | Alejandro Davidovich Fokina | | - | | Filip Krajinović | 0 | : | 2 |
| Mar 16 • 17:50 | Dominic Thiem | | - | | Lloyd Harris | 0 | : | 2 |
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| Mar 17 • 11:00 | Denis Shapovalov | | - | | Hubert Hurkacz | 2 | : | 0 |
| Mar 17 • 11:00 | Jérémy Chardy | | - | | Karen Khachanov | 2 | : | 1 |
| Mar 17 • 12:55 | Lorenzo Sonego | | - | | Aslan Karatsev | 1 | : | 2 |
| Mar 17 • 13:00 | Jannik Sinner | | - | | Roberto Bautista-Agut | 2 | : | 1 |
| Mar 17 • 15:10 | Márton Fucsovics | | - | | Dušan Lajović | 2 | : | 1 |
| Mar 17 • 16:00 | Aljaž Bedene | | - | | Kei Nishikori | 0 | : | 2 |
| Mar 17 • 17:30 | Taylor Harry Fritz | | - | | Andrey Rublev | 0 | : | 2 |
| Mar 17 • 17:35 | Lloyd Harris | | - | | Filip Krajinović | 2 | : | 0 |
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| Mar 18 • 12:00 | Denis Shapovalov | | - | | Jérémy Chardy | 2 | : | 0 |
| Mar 18 • 13:30 | Aslan Karatsev | | - | | Jannik Sinner | 2 | : | 1 |
| Mar 18 • 16:00 | Lloyd Harris | | - | | Kei Nishikori | 2 | : | 1 |
| Mar 18 • 17:30 | Márton Fucsovics | | - | | Andrey Rublev | 0 | : | 2 |
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| Mar 19 • 14:00 | Lloyd Harris | | - | | Denis Shapovalov | 2 | : | 1 |
| Mar 19 • 16:00 | Aslan Karatsev | | - | | Andrey Rublev | 2 | : | 1 |
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| Mar 20 • 16:00 | Lloyd Harris | | - | | Aslan Karatsev | 0 | : | 2 |
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Dubai Tennis Championships / Men's Singles 2021
