DUBAI, United Arab Emirates (AP) — American teen Catherine "CiCi" Bellis captured her first career Top 10 win on Wednesday when she upset sixth-ranked Agnieszka Radwanska 6-4, 2-6, 6-2 in the third round at the Dubai Tennis Championships.
"It's definitely, obviously, the biggest win of my career, and probably one of the best days of my life," Bellis said.
The 17-year-old Bellis, ranked 70th, had lost her previous four matches against top 10 opponents.
Bellis is one of two teenagers in the quarterfinals with 19-year-old Ana Konjuh of Croatia beating eighth-seeded Elena Vesnina of Russia 3-6, 6-4, 7-6 (4).
Bellis led 2-0 in the third set before fourth-seeded Radwanska rebounded to 2-2. The Pole faded afterward with Bellis clinching 16 of the last 22 points.