Maria Yuryevna Sharapova born April 19, 1987) is a Russian professional tennis player. As of June 11, 2012 she is ranked world no. 1. A United States resident since 1994, Sharapova has won 27 WTA singles titles, including four Grand Slam singles titles. She has also won the year-end WTA Tour Championships in 2004. The Women's Tennis Association has ranked Sharapova World No. 1 in singles on five separate occasions. She became the world no. 1 for the first time on August 22, 2005, and regained the ranking for the fifth time on June 11, 2012. She has been in seven Grand Slam finals with a record of 4–3.Sharapova made her professional breakthrough in 2004 at age 17, when she defeated two-time defending champion and top seed Serena Williams in the 2004 Wimbledon final for her first Grand Slam singles title. She entered the top 10 of the WTA Rankings with the win. She
Who is the greatest grass court player?