Who has 'served' longest as ATP world number 1? | Deccan Herald
World Records - Tennis - Pledge Sports
List of ATP number 1 ranked singles tennis players - Wikipedia
World Records - Tennis - Pledge Sports
Most weeks at number 1 ATP rankings all-time 1973-2021 | Statista
ATP Tour - Incredible records 😅 | Facebook
Brilliant Djokovic claims record ATP World Tour Finals win
STAT PACK: The amazing numbers behind latest Djokovic ATP record - TennisBuzz - Breaking tennis news, live scores and features
Tennis news: Novak Djokovic breaks Federer's record for most weeks as ATP No. 1
ATP rankings - Wikipedia
List of ATP number 1 ranked singles tennis players - Wikipedia
Roger Federer: The Longest World No. 1 | ATP Tour | Tennis
Novak Djokovic Breaks Roger Federers World Record For Most Weeks at No.1 in ATP Rankings | Tennis News | India.com sports news
Novak Djokovic Eclipses Roger Federer's ATP Record For Most Weeks As Number One
Novak Djokovic Breaks Roger Federers World Record For Most Weeks at No.1 in ATP Rankings | Tennis News | India.com sports news
Djokovic breaks Sampras's world number one record
Who has 'served' longest as ATP world number 1? | Deccan Herald
2017 ATP World Tour - Wikipedia
World Records - Tennis - Pledge Sports
ATP Masters 1000: Tournaments, Records, Stats | ATP Tour | Tennis
Novak Djokovic: The Most Weeks N.1 on ATP Tour Ranking | Tennis | Eurosport - YouTube
Tennis: Federer advances to record-extending 15th ATP Finals semi - The Mainichi
ATP Tour Masters 1000 - Wikipedia
