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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 15y 357d | Queen's Club 2002 | |
| 2 | 15y 360d | Indianapolis 2005 | |
| 3 | 16y 108d | Kitzbuhel 1990 | |
| 4 | 17y 52d | Kitzbuhel 1995 | |
| 5 | 17y 101d | Kitzbuhel 1998 | |
| 6 | 17y 103d | Queen's Club 1998 | |
| 7 | 17y 211d | Washington 2007 | |
| 8 | 17y 214d | Winston-Salem 2015 | |
| 9 | 17y 228d | Queen's Club 2010 | |
| 10 | 17y 235d | Nottingham 2015 |
