 USA: W100 Charleston, SC - Singles - Main |
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| 1/16-finals | Dolehide C. | Ahn K. | 2:0 (6:1, 6:0) | details | 04.11.2020 |
| USA: W80 Tyler, TX - Singles - Main |
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| 1/16-finals | Baptiste H. | Ahn K. | 2:0 (6:2, 6:2) | details | 29.10.2020 |
| USA: W80 Macon - Singles - Main |
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| 1/8-finals | Errani S. | Ahn K. | 2:0 (6:3, 6:4) | details | 22.10.2020 |
| 1/16-finals | Andrianjafitrimo T. | Ahn K. | 0:2 (3:6, 3:6) | details | 22.10.2020 |
 France: French Open - Singles - Main |
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| 1/64-finals | Ahn K. | Williams S. | 0:2 (62:7, 0:6) | details | 28.09.2020 |
| USA: US Open - Singles - Main |
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| 1/64-finals | Ahn K. | Williams S. | 0:2 (5:7, 3:6) | details | 01.09.2020 |
| USA: Cincinnati - Singles - Qualification |
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| Final | Fernandez L. A. | Ahn K. | 2:0 (6:4, 6:1) | details | 21.08.2020 |
| Semi-finals | Friedsam A-L. | Ahn K. | 0:2 (5:7, 0:6) | details | 20.08.2020 |
| USA: Lexington - Singles - Main |
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| 1/16-finals | Ahn K. | Blinkova A. | 1:1 RET. (6:2, 4:6, 1:3) | details | 11.08.2020 |
| USA: Lexington - Singles - Qualification |
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| Final | Ahn K. | Jovic J. | 2:1 (2:6, 6:4, 6:2) | details | 10.08.2020 |
| Semi-finals | Ahn K. | Talaba G. | 2:1 (7:64, 2:6, 7:5) | details | 09.08.2020 |
| USA: World TeamTennis - Singles - Main |
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| | Williams V. | Ahn K. | 0:1 (44:5) | details | 19.07.2020 |
| USA: Indian Wells - Singles - Main |
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| 1/8-finals | Ahn K. | Begu I. | 0:2 (3:6, 3:6) | details | 05.03.2020 |
| 1/16-finals | Ahn K. | Arconada U. M. | 2:1 (6:1, 4:6, 6:1) | details | 04.03.2020 |
 United Kingdom: W25 Glasgow - Singles - Main |
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| 1/8-finals | Ahn K. | Benoit M. | 1:1 RET. (6:3, 67:7, 2:3) | details | 20.02.2020 |
| 1/16-finals | Ahn K. | Galfi D. | 2:0 (6:2, 6:3) | details | 18.02.2020 |
 Russia: St. Petersburg - Singles - Main |
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| 1/16-finals | Vekic D. | Ahn K. | 2:0 (6:4, 6:1) | details | 11.02.2020 |
| Russia: St. Petersburg - Singles - Qualification |
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| Final | Ahn K. | Martincova T. | 2:0 (7:61, 6:4) | details | 09.02.2020 |
| Semi-finals | Ahn K. | Strakhova V. | 2:1 (6:2, 4:6, 6:3) | details | 08.02.2020 |
 Australia: Australian Open - Singles - Main |
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| 1/64-finals | Ahn K. | Wozniacki C. | 0:2 (1:6, 3:6) | details | 20.01.2020 |
| Australia: Hobart - Singles - Qualification |
|---|
| Final | Sorribes Tormo S. | Ahn K. | 2:0 (6:4, 7:5) | details | 12.01.2020 |
| Semi-finals | Repac M. | Ahn K. | 0:2 (2:6, 2:6) | details | 11.01.2020 |
 New Zealand: Auckland - Singles - Qualification |
|---|
| Quarter-finals | Ahn K. | McNally C. | 1:2 (7:60, 3:6, 3:6) | details | 04.01.2020 |
 China: Tianjin - Singles - Main |
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| 1/16-finals | Wang Xiy. | Ahn K. | 2:0 (6:2, 7:62) | details | 08.10.2019 |
| 1/16-finals | Kenin S. | Ahn K. | CAN. | details | 08.10.2019 |
| China: Beijing - Singles - Qualification |
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| Semi-finals | Linette M. | Ahn K. | 2:0 (6:2, 6:1) | details | 27.09.2019 |
 South Korea: Seoul - Singles - Main |
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| Quarter-finals | Ahn K. | Alexandrova E. | 1:2 (7:60, 4:6, 4:6) | details | 20.09.2019 |
| 1/8-finals | Bogdan A. | Ahn K. | 1:2 (6:0, 4:6, 62:7) | details | 18.09.2019 |
| 1/16-finals | Ahn K. | Bacsinszky T. | 2:0 (6:0, 6:0) | details | 16.09.2019 |
| USA: US Open - Singles - Main |
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| 1/8-finals | Ahn K. | Mertens E. | 0:2 (1:6, 1:6) | details | 02.09.2019 |
| 1/16-finals | Ahn K. | Ostapenko J. | 2:0 (6:3, 7:5) | details | 31.08.2019 |
| 1/32-finals | Kalinskaya A. | Ahn K. | 0:2 (2:6, 3:6) | details | 29.08.2019 |
| 1/64-finals | Ahn K. | Kuznetsova S. | 2:0 (7:5, 6:2) | details | 28.08.2019 |
| USA: New York - Singles - Main |
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| 1/8-finals | Muchova K. | Ahn K. | 2:0 (6:3, 6:1) | details | 21.08.2019 |
