 Taiwan: Kaohsiung - Singles - Main |
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| 1/32-finals | Nam Ji S. | Yu Ch. Y. | 1:1 RET. (4:6, 6:2, 3:1) | details | 17.09.2019 |
| Taiwan: Taipei - Singles - Main |
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| 1/32-finals | Wu Tung-Lin | Yu Ch. Y. | 2:0 (6:4, 6:3) | details | 08.04.2019 |
 World: Davis Cup - Group II - Singles - Main |
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| | Habib H. | Yu Ch. Y. | CAN. | details | 04.02.2018 |
| | Hassan B. | Yu Ch. Y. | 2:1 (5:7, 6:3, 6:4) | details | 03.02.2018 |
| World: Davis Cup - Group I - Singles - Main |
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| | Chung H. | Yu Ch. Y. | 3:0 (6:4, 6:2, 6:1) | details | 17.09.2017 |
| Taiwan: Taipei - Singles - Main |
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| 1/16-finals | Yu Ch. Y. | Ito T. | 0:2 (4:6, 4:6) | details | 25.04.2016 |
| Taiwan: Taipei - Singles - Main |
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| 1/16-finals | Yu Ch. Y. | Smith J. P. | 0:2 (4:6, 3:6) | details | 28.04.2015 |
| Taiwan: Taipei - Singles - Main |
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| 1/16-finals | Wang J. | Yu Ch. Y. | 2:1 (5:7, 6:2, 6:1) | details | 29.04.2014 |
| Taiwan: Kaohsiung 2 - Singles - Main |
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| 1/16-finals | Lee H. | Yu Ch. Y. | 2:0 (7:5, 6:4) | details | 18.04.2012 |
| Taiwan: Kaohsiung - Singles - Main |
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| 1/8-finals | Reix C. | Yu Ch. Y. | 2:0 (6:4, 6:3) | details | 12.04.2012 |
| 1/16-finals | Liao F. T. | Yu Ch. Y. | 0:2 (2:6, 1:6) | details | 10.04.2012 |