Serena Williams’ ex-coach predicts Novak Djokovic’s retirement could come sooner than expected. Discover why motivation—not ...

Teenage tennis phenom Mirra Andreeva toppled world No. 1 Aryna Sabalenka 2-6, 6-4, 6-3 to win the BNP Paribas Open at Indian Wells on Sunday. But that's not all the 17-year-old Andreeva accomplished.