Djokovic to clinch record seventh year-end number one spot | Reuters
2019 WTA Tour - Wikipedia
Russia's number one ranked tennis player Daria Kasatkina comes out as gay | World News | Sky News
Ukraine's Snigur stuns former number one Halep in first round | Reuters
:focal(1129x663:1131x661)/origin-imgresizer.eurosport.com/2018/02/16/2272563-47350050-2560-1440.jpg "Federer becomes oldest ATP world number one - Eurosport")
Federer becomes oldest ATP world number one - Eurosport
List of ATP number 1 ranked singles tennis players - Wikipedia
Cameron Norrie stuns former world number one Rafael Nadal in United Cup | Tennis News | Sky Sports
5 things to know about Carlos Alcaraz, the teen who is world number one after US Open victory
World No.1 Ashleigh Barty hopes 2020 will be golden year
Cameron Norrie becomes British tennis number one after reaching Indian Wells semi-finals | ITV News
Nadal: 'Number one ranking no longer the fight' - Sportstar
WTA Rankings Update 2019: Barty the new No.1, Venus back in the Top 50
/cloudfront-us-east-1.images.arcpublishing.com/gray/S65TKVF6T5ARTATUGMDN7ZJ4CI.jpg "Defending champion Madison Keys, World #1 Ashleigh Barty headline Volvo Car Open field")
Defending champion Madison Keys, World #1 Ashleigh Barty headline Volvo Car Open field
Alcaraz beats Cilic and could become youngest ever world number one: What does he need to achieve it? | Marca
List of ATP number 1 ranked singles tennis players - Wikipedia
Dan Evans on rise to British number one from being unranked in April 2018 - BBC Sport
Ashleigh Barty: World number one makes shock call to quit tennis - BBC News
US Open final between Alcaraz and Ruud will also determine world number one | Marca
Who is the world No. 1 in men's tennis? Updated ATP rankings and explainer | Sporting News India
Kelley Pulls Off Win At Number One Singles | Arizona Christian University Athletics
Roger Federer and Novak Djokovic Battle for No. 1 Ranking - The New York Times
Garbiñe Muguruza crowned the world's number one tennis player | BBVA
Tennis-World number one Barty uncertain of schedule as Osaka closes in | Reuters
