October 23, 1973: A Sort of an End – Heavy Topspin
September 8, 1973: Super Saturday – Heavy Topspin
The history of the ATP rankings - CNBNews
List of ATP number 1 ranked singles tennis players - Wikipedia
Notable No. 1s In 50 Years Of Pepperstone ATP Rankings (Part 1) | ATP Tour | Tennis
The Rankings That Changed Tennis | ATP Tour | Tennis
ATP TOP10 Players History since 1973 - Ranking by the total number of weeks - Upd. October 8, 2018 - YouTube
August 27, 1973: The Controversial Sport – Heavy Topspin
The men who ruled Tennis - a history of the ATP Ranking No. 1 (1973 - 2022) - YouTube
The Open's Breakthrough of 1973 - The New York Times
Jimmy Connors: A Serial No. 1 In The FedEx ATP Rankings | ATP Tour | Tennis
Chart: Roger Federer Crowned Oldest No. 1 in Tennis at Age 36 | Statista
Tennis: Men's singles players who have held the ATP Tour No. 1 ranking
August 8, 1973: Countermove – Heavy Topspin
August 13, 1973: Dream Team, Assemble – Heavy Topspin
ATP Rankings July 22, 2013: No changes in rank for top 5 – Rafael Nadal Fans
ATP rankings - Wikipedia
ATP Heritage Nastase No 1 FedEx ATP Rankings | ATP Tour | Tennis
August 30, 1973: Think Cool – Heavy Topspin
Tennis rankings: Everything you need to know
August 19, 1973: Sometimes on Sunday – Heavy Topspin
ATP Rankings, Aug 12: Rafael Nadal moves to No. 3 – Rafael Nadal Fans
ATP rankings - Wikipedia
New Ranking Maps and Charts – Heavy Topspin
Bjorn Borg: The Ice Man - ATP Heritage | ATP Tour | Tennis
Rafael Nadal stays on top of ATP rankings (June 9, 2014) – Rafael Nadal Fans
