15-Year-Old Catherine Bellis Upsets 12-Seed At U.S. OpenCatherine Bellis turned 15 years old in April and sits at 1,208 on the WTA's rankings. At the start of the day, her career record as a pro in singles matches was 8-4. That record has improved to 9-4, as Bellis just finished off 12-seeded Dominka Cibulkova in a first-round match at the U.S. Open. ...
