Those early days with her dad led to a strong junior career, and eventually the CT. But despite a steadily rising rank, Defay has largely been surfing in the shadows of her celebrity peers.
Don't be fooled. The 22-year-old has a clear sense of who she is and what she wants -- and she's finally risen up into the spotlight, where she belongs. Here are some of the career moments that have led to her to World No. 4.