Maria Sharapova is in the Women's Tennis Association.
Maria Sharapova . Her 35 singles titles and five Grand Slam titles -- two at the French Open and one each at the Australian Open , Wimbledon , and US Open -- rank third among active players , behind Serena and Venus Williams . Venus Williams . Ranked World No. 11 in singles as of January 28 , 2017 , Williams has been ranked World No. 1 by the Women 's Tennis Association on three occasions , for a total of 11 weeks .