Federer marks No.1 ranking with 98th title in Stuttgart - EgyptToday
2018 ATP World Tour - Wikipedia
Roger Federer records, stats: 20 Grand Slam titles, Australian Open prize money, ATP rankings, Federer Nadal race for No.1
ATP Rankings: Daniil Medvedev topples Novak Djokovic for No.1 spot; Murray returns to top 50 | Tennis News – India TV
JULY 2018: ATP & WTA Champions - SERVE AND RALLY
2018 ATP World Tour - Wikipedia
Who is the world No.1 in men's tennis? Updated ATP rankings and explainer | Sporting News
ATP Rankings Update 31 December 2018 - YouTube
Big 3 of Djokovic, Nadal, Federer closes 2018 ranked 1-2-3 | The Seattle Times
ATP Rankings Movers: Rafael Nadal Returns To No. 1 | ATP Tour | Tennis
List of ATP number 1 ranked singles tennis players - Wikipedia
ATP tennis rankings: Latest men's standings as Novak Djokovic ends 2018 as world No1 | London Evening Standard | Evening Standard
Roger Federer will top tennis rankings after five-year absence - The Boston Globe
ATP Rankings Update 3 September 2018 - YouTube
Weekly Tennis ELO Rankings: 2018 ATP Finals Predictions
ATP Rankings Movers: Roger Federer Returns To No. 1 | ATP Tour | Tennis
ATP rankings: Coric jumps to 29, Tsitsipas back in top-5
ATP RANKINGS. Alcaraz, Nadal, Ruud, Medvedev at the top with Musetti at a career high - Tennis Tonic - News, Predictions, H2H, Live Scores, stats
Roger Federer Pursues the No. 1 Ranking Again. Why Not? - The New York Times
Big 3 of Djokovic, Nadal, Federer closes 2018 ranked 1-2-3 | The Seattle Times
ATP Rankings Movers: Roger Federer Returns To No. 1 | ATP Tour | Tennis
In what position of the ATP ranking does Novak Djokovic stand after winning the 2023 Australian Open? - AS USA
ATP Rankings Update: John Isner jumps into Top 10
