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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 18y 312d | Queen's Club 2019 | |
| 2 | 19y 54d | Halle 2016 | |
| 3 | 19y 172d | Queen's Club 2021 | |
| 4 | 19y 242d | Halle 2017 | |
| 5 | 20y 5d | Halle 2024 | |
| 6 | 20y 44d | Queen's Club 2023 | |
| 7 | 20y 51d | Queen's Club 2023 | |
| 8 | 20y 59d | Halle 2017 | |
| 9 | 20y 149d | Queen's Club 2018 | |
| 10 | 20y 295d | Halle 2025 |
