"It's just a matter of belief within myself, that no matter how well or bad or good I'm playing, or my opponent is playing, I know I can tough it out," the No. 3-seeded Sharapova said after her two-and-a-half-hour victory. "No matter what the situation is, I have the belief."
Also winning on the women's side Monday was Venus Williams of the US. The former US Open champ defeated Russia's Vesna Delonts, 6-4, 6-3. Venus will next take on German Sabine Lisicki, who is seeded 22nd in the women's draw.
On the men's side Monday, former champion Roger Federer advanced to the second round with a win.