 United Arab Emirates: Abu Dhabi - Doubles - Main |
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| 1/16-finals | Klepac A./Kostyuk M. | Aoyama S./Shibahara E. | 1:2 (6:4, 5:7, 10:12) | details | 07.01.2021 |
 Italy: W25 Selva Gardena - Doubles - Main |
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| Quarter-finals | Kostyuk M./Paar L. | Chwalinska M./Fruhvirtova L. | 0:2 (3:6, 5:7) | details | 16.12.2020 |
 Austria: Linz - Doubles - Main |
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| 1/8-finals | Bara Irina M./Sorribes Tormo S. | Kostyuk M./Yastremska D. | WO. | details | 10.11.2020 |
 USA: W80 Tyler, TX - Doubles - Main |
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| Semi-finals | Zamarripa A./Zamarripa M. | Kostyuk M./Tauson C. | WO. | details | 31.10.2020 |
| Quarter-finals | Kostyuk M./Tauson C. | Arruabarrena L./Errani S. | WO. | details | 30.10.2020 |
| 1/8-finals | Danilina A./Raina A. | Kostyuk M./Tauson C. | 0:2 (2:6, 2:6) | details | 30.10.2020 |
| USA: W80 Macon - Doubles - Main |
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| 1/8-finals | Di Lorenzo F./Loeb J. | Arconada U. M./Kostyuk M. | 2:1 (0:6, 7:5, 10:7) | details | 20.10.2020 |
 France: French Open - Doubles - Main |
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| Quarter-finals | Kostyuk M./Sasnovich A. | Babos T./Mladenovic K. | 0:2 (2:6, 5:7) | details | 06.10.2020 |
| 1/8-finals | Dabrowski G./Ostapenko J. | Kostyuk M./Sasnovich A. | 0:2 (4:6, 4:6) | details | 04.10.2020 |
| 1/16-finals | Flipkens K./Pavlyuchenkova A. | Kostyuk M./Sasnovich A. | 1:2 (3:6, 6:4, 2:6) | details | 02.10.2020 |
| 1/32-finals | Kostyuk M./Sasnovich A. | Hradecka L./Klepac A. | 2:0 (6:4, 6:1) | details | 01.10.2020 |
| France: W60+H Saint-Malo - Doubles - Main |
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| 1/8-finals | Frech M./Golubic V. | Brugnone F./Kostyuk M. | 2:0 (6:2, 6:2) | details | 08.09.2020 |
Turkey: Istanbul - Singles - Qualification
Czech Republic: Prague - Singles - Main
World: Others matches - Singles - Main