Bellis was backed by a partisan crowd on Court Six , including some friends who helped roar her to a famous victory . 15-year - old Catherine ` ` Cici '' Bellis win her first ever grand slam title . Bellis defeats 12th seed Dominica Duval in the U.S. Open first round . The junior world No . 2 was given a wildcard after winning the U.S. national championships . She plays India 's Victoria Diyas in the second round .
15-year - old Catherine ` ` Cici '' Bellis win her first ever grand slam title . Bellis defeats 12th seed Dominica Duval in the U.S. Open first round . The junior world No . 2 was given a wildcard after winning the U.S. national championships . She plays India 's Victoria Diyas in the second round .