List of ATP number 1 ranked singles tennis players - Wikipedia
Association of Tennis Professionals (ATP) Rankings: Novak Djokovic Maintains Top Spot, Roger Federer Falls to 7th | India.com
ATP Finals 2019: Novak Djokovic registers easy win over Matteo Berrettini in tournament opener-Sports News , Firstpost
Rafael Nadal set to be oldest to end calendar year as No. 1 in history of ATP Rankings in 46 years | Tennis News
In Italian Tennis, It's the Men's Turn to Shine - The New York Times
Djokovic consolidates top spot in men's tennis rankings | Tennis News - Hindustan Times
Ranking Atp aggiornato a lunedì 4 novembre 2019: ottavo Berrettini, nuovo best ranking
ATP rankings: end of year, Rafael Nadal, Roger Federer, Novak Djokovic, Alex de Minaur
Rafael Nadal Clinches Year-End No. 1 ATP Ranking For Fifth Time | ATP Tour | Tennis
Justin Roberts – Top 800 in ATP Singles' Ranking – Bahamas Lawn Tennis Association
Wimbledon 2019: Why Rafael Nadal's gripe with organisers' special seeding formula over ATP Rankings makes sense-Sports News , Firstpost
Serbia motivated by 2019 Davis Cup heartbreak, says Djokovic | Reuters
ATP Rankings 2019: Rafael Nadal No.1 men's player after overtaking Novak Djokovic | London Evening Standard | Evening Standard
ATP Finals: Rafael Nadal 'Fighting' To End 2019 As World Number One Ahead Of Novak Djokovic
Ranking History of Top 10 Men's Tennis Players (1990-2019) - YouTube
ATP Rankings vs ATP Race To London: What's The Difference? | ATP Tour | Tennis
Tennis, Ranking ATP (23 dicembre 2019): Rafael Nadal numero 1, Berrettini ottavo. Jannik Sinner al numero 78 – OA Sport
Top Seven Stories Of 2019 So Far | ATP Tour | Tennis
ATP World Number One Battle: Can Novak Djokovic End The Year On Top? - EssentiallySports
ATP Ranking Update: Alcaraz And Nadal Make A History As No. 1 And No. 2
Who is the world No.1 in men's tennis? Updated ATP rankings and explainer | Sporting News
ATP Rankings vs ATP Race To London: What's The Difference? | ATP Tour | Tennis
