Her parents, Yuri and Yelena, are from Gomel, Belarussian SSR.
In 1989, when Sharapova was two, the family moved to Sochi, Krasnodar Krai, Russia.
There her father Yuri befriended Aleksandr Kafelnikov, whose son Yevgeny would go on to win two Grand Slam singles titles and become Russia's first world No. Aleksandr gave Sharapova her first tennis racquet in 1991 when she was four, whereupon she began practicing regularly with her father at a local park.
In all, she won three junior singles tournaments and was runner-up at five, including two junior Grand Slam events.
Her win-loss record in junior competition was 47–9.
She is one of ten women, and the only Russian, to hold the career Grand Slam.