Novak Dojokovic breaks world No 1 record – HEAD
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Novak Djokovic eclipses Federer's all-time ATP record for most weeks at No 1 - Tennis Majors
Novak Djokovic Wins Australian Open, Tightens Grand Slam Race - The New York Times
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Nadal Clinches Year-End No. 1 ATP Ranking For Fifth Time - Tennis TourTalk
Murray secures world No. 1 tennis ranking after Paris Masters opponent withdraws
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Top 10 Greatest Men's Tennis Players of All Time - HowTheyPlay
Novak Djokovic Sets New All-Time Record For Weeks At No. 1 In FedEx ATP Rankings | ATP Tour | Tennis
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The complete history of every No. 1 male tennis player - SWI swissinfo.ch
ATP Rankings 2019: Rafael Nadal No.1 men's player after overtaking Novak Djokovic | London Evening Standard | Evening Standard
Ranking of the top 150 male tennis players in the world for 2021 - Novak Djokovic Still No. 1 - CEOWORLD magazine
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Roger Federer Is World No. 1 Again Despite Not Playing for 2 Months
2016 ATP World Tour - Wikipedia
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Men's World No 1 Tennis Player Tests Positive For Coronavirus
Dan Evans Proves He Really Is Britain's Current No.1 - Last Word On Tennis
Novak Djokovic: "World No 1 record is my main goal for 2021" - Tennis Majors
No. 1 Djokovic, Pospisil would lead new men's tennis group - The Mainichi
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