Best Women's Tennis Players In History - The Delite
Oracle/ITA Division I Men's Team Rankings — January 22, 2020 - ITA #WeAreCollegeTennis
No US men in Top 30 for 1st time in computer tennis rankings
Sports Digest: No American man in top 30 since men's tennis started rankings in 1973 - Portland Press Herald
Alcaraz, Ruud to play for world No. 1 ranking in 2022 US Open men's singles final - Official Site of the 2022 US Open Tennis Championships - A USTA Event
Ranking History of Top 10 Men's Tennis Players (1990-2019) - YouTube