Sharapova has been labeled a power baseliner by tennis observers, with excellent power, depth, and angles on her groundstrokes, which are particularly effective on hard and grass courts.Her double-handed backhand is generally regarded as her more penetrating and more reliable wing. While she is also known to generate many winners from her forehand, it is occasionally known to break down when she is not serving well and produce errors. She is not a traditional volleyer, instead preferring to use a powerful "swinging" volley for net approaches, and critics also claim that, for her height, Sharapova has good on-court speed.
In 2004 The 17-year-old Sharapova went into Wimbledon as the thirteenth seed. She reached her second consecutive Grand Slam quarterfinal, where she defeated Ai Sugiyama 5–7, 7–5, 6–1, and then upset fifth-seeded and former World No. 1 Lindsay Davenport in the semifinals 2–6, 7–6, 6–1. Her opponent in the final was two-time defending champion Serena Williams, with Williams an overwhelming favorite because of her experience and higher seeding. Sharapova, however, caused a major upset by defeating Williams 6–1, 6–4, to become the third-youngest Wimbledon women's champion (after Lottie Dod and Martina Hingis) and second-youngest in the open era, the first Russian to win the tournament and the lowest seed to win the women's event at the time. The win also meant that Sharapova earned a top ten ranking for the first time.
As the third seed at the US Open in 2006, Sharapova reached the quarterfinals without losing a set, before defeating Tatiana Golovin 7–6, 7–6 in the quarterfinals. She then defeated Mauresmo in a semifinal 6–0, 4–6, 6–0, and in her second Grand Slam final, she prevailed over second-ranked Henin-Hardenne 6–4, 6–4 to win her second Grand Slam singles title, having dropped just one set en route.
This year she defeated Ana Ivanovic in the final 7–5, 6–3, thus winning the Australian Open without dropping a set.