Maria Yuryevna Sharapova is a Russian former professional tennis player. She was ranked as the world No. 1 in women's singles by the Women's Tennis Association (WTA) for 21 weeks. Sharapova won 36 WTA Tour-level singles titles, including five major titles, as well as the 2004 WTA Tour Championships. She is one of ten women to achieve the career Grand Slam in singles. WTA world No. 1 from January 29, 2007 to March 18, 2007 — 7 weeks. Wiki link