List of WTA number 1 ranked singles tennis players - Wikipedia
Ashleigh Barty Wins the French Open for Her First Grand Slam Singles Title - The New York Times
2019 Final ITA Division I Singles and Doubles Rankings Released - ITA #WeAreCollegeTennis
Projected Year-End WTA Rankings for 2019 - Tennis Connected
Tennis: Women's singles players who have held the WTA No. 1 ranking
American Tennis on Twitter: "The first @American_Conf Women's Tennis Player of the Month for the 2019-20 season is Martina Okalova of @TulsaWTennis , who is ranked No. 73 nationally in singles and
Oracle/ITA Division II Women's Team Rankings — April 10, 2019 - ITA #WeAreCollegeTennis
WTA Rankings Update 2019: Osaka regains No.1 spot, Andreescu surges into Top 15
Top Ten Women's Singles Tennis Players in 2019 – Tennis Academy
Women's Tennis Ranked 17th in the Nation - Wayne State University Athletics