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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 20y 44d | Queen's Club 2023 | |
| 2 | 21y 215d | Halle 2018 | |
| 3 | 22y 42d | Queen's Club 2025 | |
| 4 | 22y 305d | Halle 2024 | |
| 5 | 22y 351d | Halle 2021 | |
| 6 | 23y 24d | Queen's Club 2014 | |
| 7 | 23y 256d | Queen's Club 2012 | |
| 8 | 24y 21d | Queen's Club 2011 | |
| 9 | 25y 60d | Queen's Club 2021 | |
| 10 | 25y 121d | Halle 2022 | |
| 11 | 26y 1d | Halle 2023 | |
| 12 | 26y 26d | Queen's Club 2013 | |
| 13 | 26y 61d | Queen's Club 2022 | |
| 14 | 27y 31d | Queen's Club 2024 | |
| 15 | 27y 233d | Halle 2011 | |
| 16 | 27y 364d | Halle 2025 | |
| 17 | 28y 31d | Queen's Club 2015 | |
| 18 | 29y 29d | Queen's Club 2016 | |
| 19 | 29y 262d | Queen's Club 2018 | |
| 20 | 31y 306d | Halle 2013 |
