 France: Cassis - Singles - Qualification |
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| Semi-finals | Moriya H. | Khan Z. | 2:0 (6:4, 6:2) | dettagli | 05.09.2021 |
 USA: US Open - Singles - Qualification |
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| Final | Khan Z. | Donskoy E. | 1:2 (4:6, 7:5, 64:7) | dettagli | 27.08.2021 |
| Semi-finals | Dzumhur D. | Khan Z. | 0:2 (2:6, 65:7) | dettagli | 26.08.2021 |
| Quarter-finals | Khan Z. | Stakhovsky S. | 2:1 (4:6, 7:5, 6:3) | dettagli | 25.08.2021 |
 Portugal: M25 Idanha-a-Nova - Singles - Main |
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| Final | Khan Z. | Moreno De Alboran N. | 0:0 RET. (0:1) | dettagli | 18.07.2021 |
| Semi-finals | Rodrigues D. | Khan Z. | 1:2 (6:3, 1:6, 3:6) | dettagli | 17.07.2021 |
| Quarter-finals | Cozbinov A. | Khan Z. | 0:2 (0:6, 5:7) | dettagli | 16.07.2021 |
| 1/8-finals | Niki T. | Khan Z. | 0:2 (2:6, 3:6) | dettagli | 15.07.2021 |
| 1/16-finals | Araujo P. | Khan Z. | 0:2 (0:6, 2:6) | dettagli | 14.07.2021 |
| USA: Little Rock - Singles - Main |
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| 1/16-finals | Khan Z. | Krueger M. | 0:2 (2:6, 4:6) | dettagli | 31.05.2021 |
 Georgia: M15 Tbilisi - Singles - Main |
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| Quarter-finals | Khan Z. | Erel Y. | 0:2 (2:6, 4:6) | dettagli | 21.05.2021 |
| 1/8-finals | Khan Z. | Cash J. | 2:0 (7:63, 6:4) | dettagli | 20.05.2021 |
| 1/16-finals | Khan Z. | Cozbinov A. | 2:1 (3:6, 6:4, 6:0) | dettagli | 19.05.2021 |
 Israel: M15 Jerusalem - Singles - Main |
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| Final | Leshem E. | Khan Z. | 0:2 (3:6, 4:6) | dettagli | 16.05.2021 |
| Semi-finals | Lazarov A. | Khan Z. | 0:1 RET. (0:6, 0:2) | dettagli | 15.05.2021 |
| Quarter-finals | Khan Z. | Gengel M. | 2:0 (7:5, 7:63) | dettagli | 14.05.2021 |
| 1/8-finals | Khan Z. | Cash J. | 2:0 (7:63, 6:4) | dettagli | 13.05.2021 |
| 1/16-finals | Khan Z. | Goldenberg L. | 2:0 (6:0, 6:1) | dettagli | 12.05.2021 |
| Israel: M15 Ramat Hasharon - Singles - Main |
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| Quarter-finals | Khan Z. | Patael B. | 0:2 (5:7, 1:6) | dettagli | 07.05.2021 |
| 1/8-finals | Khan Z. | Castelnuovo L. | 2:0 (6:3, 6:2) | dettagli | 06.05.2021 |
| 1/16-finals | Khan Z. | Simon S. | 2:0 (6:2, 6:2) | dettagli | 04.05.2021 |
| USA: Orlando - Singles - Main |
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| Quarter-finals | Brooksby J. | Khan Z. | 2:0 (6:4, 6:3) | dettagli | 16.04.2021 |
| 1/8-finals | Khan Z. | Uchiyama Y. | 2:0 (7:65, 7:65) | dettagli | 14.04.2021 |
| 1/16-finals | Khan Z. | King K. | 2:1 (6:3, 1:6, 6:1) | dettagli | 13.04.2021 |
 India: M15 Pune - Singles - Main |
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| Final | Crawford O. | Khan Z. | 2:0 (6:3, 6:0) | dettagli | 28.03.2021 |
| Semi-finals | Khan Z. | Mridha J. | 2:0 (6:1, 7:5) | dettagli | 27.03.2021 |
| Quarter-finals | Khan Z. | McHugh A. | 2:1 (4:6, 6:4, 6:0) | dettagli | 26.03.2021 |
| 1/8-finals | Khan Z. | Prashanth V. | 2:0 (6:3, 7:5) | dettagli | 25.03.2021 |
| 1/16-finals | Khan Z. | Shanmugam A. | 2:0 (6:2, 6:0) | dettagli | 24.03.2021 |
| India: M15 Indore - Singles - Main |
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| Final | McHugh A. | Khan Z. | 1:2 (7:68, 66:7, 64:7) | dettagli | 14.03.2021 |
| Semi-finals | Vanshelboim E. | Khan Z. | 0:2 (1:6, 4:6) | dettagli | 13.03.2021 |
| Quarter-finals | Sureshkumar M. | Khan Z. | 0:2 (4:6, 1:6) | dettagli | 12.03.2021 |
| 1/8-finals | Khan Z. | Rawat S. | 2:0 (6:2, 6:2) | dettagli | 11.03.2021 |
| 1/16-finals | Prashanth V. | Khan Z. | 0:2 (3:6, 3:6) | dettagli | 10.03.2021 |
| India: M15 Lucknow - Singles - Main |
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| Final | Myneni S. | Khan Z. | 0:2 (63:7, 3:6) | dettagli | 07.03.2021 |
| Semi-finals | Khan Z. | Vanshelboim E. | 2:0 (6:4, 6:1) | dettagli | 06.03.2021 |
| Quarter-finals | Khan Z. | Mridha J. | 2:0 (6:4, 6:1) | dettagli | 05.03.2021 |
| 1/8-finals | Castelnuovo L. | Khan Z. | 0:2 (3:6, 61:7) | dettagli | 04.03.2021 |
| 1/16-finals | Khan Z. | O'Hoisin O. | 2:0 (6:3, 6:3) | dettagli | 02.03.2021 |
| USA: M25 Naples, FL 2 - Singles - Main |
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| 1/8-finals | Khan Z. | Harrison C. | 1:2 (7:64, 3:6, 5:7) | dettagli | 25.02.2021 |
| 1/16-finals | Witten J. | Khan Z. | 0:2 (2:6, 5:7) | dettagli | 24.02.2021 |
| France: Cassis - Doubles - Main |
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| 1/8-finals | Cazaux A./Khan Z. | Drzewiecki K./Zuk K. | WO. | dettagli | 07.09.2021 |
| Israel: M15 Ramat Hasharon - Doubles - Main |
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| 1/8-finals | Corwin F./Stalder R. | Khan Z./Roberts J. | 2:1 (5:7, 6:4, 10:5) | dettagli | 04.05.2021 |
| India: M15 Pune - Doubles - Main |
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| Semi-finals | Carr S./Kotzen A. | Khan Z./Svrcina D. | 2:1 (6:4, 3:6, 10:7) | dettagli | 26.03.2021 |
| Quarter-finals | Bergevi F./Mridha J. | Khan Z./Svrcina D. | 0:2 (1:6, 4:6) | dettagli | 25.03.2021 |
| 1/8-finals | Rawat S./Sureshkumar M. | Khan Z./Svrcina D. | 1:2 (6:2, 3:6, 3:10) | dettagli | 23.03.2021 |
| India: M15 Indore - Doubles - Main |
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| Semi-finals | Binding J./Patten H. | Khan Z./Palan D. | 2:0 (6:2, 6:2) | dettagli | 12.03.2021 |
| Quarter-finals | Dahiya J./Singh D. | Khan Z./Palan D. | 0:2 (1:6, 2:6) | dettagli | 11.03.2021 |
| 1/8-finals | Khan Z./Palan D. | Bergevi F./Mridha J. | 2:0 (7:5, 6:3) | dettagli | 09.03.2021 |
| India: M15 Lucknow - Doubles - Main |
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| 1/8-finals | Rawat S./Sureshkumar M. | Khan Z./Palan D. | 2:1 (2:6, 6:3, 10:4) | dettagli | 03.03.2021 |
