Nick Kyrgios, who is currently ranked 37th, said he's the first or 2nd-best tennis player in the world after beating No. 1 Daniil Medvedev
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6 men who maintained the World No. 1 ranking for an entire tennis season ft. Roger Federer, Pete Sampras
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ATP Rankings 2019: Rafael Nadal No.1 men's player after overtaking Novak Djokovic | London Evening Standard | Evening Standard
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Ranking of the top 150 male tennis players in the world for 2021 - Novak Djokovic Still No. 1 - CEOWORLD magazine
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