Dan Evans on rise to British number one from being unranked in April 2018 - BBC Sport
2019 WTA Tour - Wikipedia
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
Medvedev replaces Djokovic as world number one
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Cameron Norrie becomes British tennis number one after reaching Indian Wells semi-finals | ITV News
Former world number one Halep provisionally suspended for doping | Reuters
Alcaraz beats Cilic and could become youngest ever world number one: What does he need to achieve it? | Marca
Emma Raducanu - Wikipedia
Ashleigh Barty: World number one makes shock call to quit tennis - BBC News
US Open: Three players in contention for the men's world number one spot
Roger Federer creates history upon return to World No 1 | Sports News,The Indian Express
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Cameron Norrie stuns former world number one Rafael Nadal in United Cup | Tennis News | Sky Sports
Ash Barty keeps tennis world No 1 ranking despite missing grand slams | Ash Barty | The Guardian
US Open final between Alcaraz and Ruud will also determine world number one | Marca
: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
Garbiñe Muguruza crowned the world's number one tennis player | BBVA
List of ATP number 1 ranked singles tennis players - Wikipedia
Tennis-World number one Barty uncertain of schedule as Osaka closes in | Reuters
Who is the world No. 1 in men's tennis? Updated ATP rankings and explainer | Sporting News India
List of ATP number 1 ranked singles tennis players - Wikipedia
Djokovic and Other Top Men Are Creating a Players' Association - The New York Times
/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
Poland's Iga Swiatek will succeed Ash Barty as world No 1 after Miami Open second-round win | Tennis News | Sky Sports
British number one Norrie finding his feet on grass ahead of Wimbledon | Reuters
