![Serbia's Novak Djokovic celebrates beating Switzerland's Roger Federer in their final tennis match at the ATP World Tour Finals at the O2 Arena in London November 12, 2012. Djokovic cemented his place Serbia's Novak Djokovic celebrates beating Switzerland's Roger Federer in their final tennis match at the ATP World Tour Finals at the O2 Arena in London November 12, 2012. Djokovic cemented his place](https://c8.alamy.com/comp/2CYE38Y/serbias-novak-djokovic-celebrates-beating-switzerlands-roger-federer-in-their-final-tennis-match-at-the-atp-world-tour-finals-at-the-o2-arena-in-london-november-12-2012-djokovic-cemented-his-place-as-the-number-one-in-tennis-when-he-beat-federer-7-6-7-5-to-win-the-atp-world-tour-finals-crown-on-monday-reutersdylan-martinez-britain-tags-sport-tennis-2CYE38Y.jpg)
Serbia's Novak Djokovic celebrates beating Switzerland's Roger Federer in their final tennis match at the ATP World Tour Finals at the O2 Arena in London November 12, 2012. Djokovic cemented his place
![Novak Djokovic ties Roger Federer record by beating Casper Ruud for sixth ATP Finals title | Tennis | Sport | Express.co.uk Novak Djokovic ties Roger Federer record by beating Casper Ruud for sixth ATP Finals title | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/1699184_1.jpg?r=1668977257001)
Novak Djokovic ties Roger Federer record by beating Casper Ruud for sixth ATP Finals title | Tennis | Sport | Express.co.uk
![ATP World Tour Finals 2019 Results: Roger Federer Eliminates Novak Djokovic | News, Scores, Highlights, Stats, and Rumors | Bleacher Report ATP World Tour Finals 2019 Results: Roger Federer Eliminates Novak Djokovic | News, Scores, Highlights, Stats, and Rumors | Bleacher Report](https://img.bleacherreport.net/img/images/photos/003/838/193/hi-res-d55ed8d004096b904722bf68feb2c158_crop_exact.jpg?w=1200&h=1200&q=75)
ATP World Tour Finals 2019 Results: Roger Federer Eliminates Novak Djokovic | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
![ATP World Tour Finals 2015 - Djokovic rules with record win - The Championships, Wimbledon - Official Site by IBM ATP World Tour Finals 2015 - Djokovic rules with record win - The Championships, Wimbledon - Official Site by IBM](https://photo-assets.wimbledon.com/images/pics/large/s_final.png)
ATP World Tour Finals 2015 - Djokovic rules with record win - The Championships, Wimbledon - Official Site by IBM
ATP Finals: Roger Federer beaten by Dominic Thiem, Novak Djokovic defeats Matteo Berrettini, tennis news
![Federer to face Djokovic in group stages in ATP World Tour Finals as Nadal handed Ferrer test | Daily Mail Online Federer to face Djokovic in group stages in ATP World Tour Finals as Nadal handed Ferrer test | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2013/11/02/article-0-15FEA3BD000005DC-124_634x425.jpg)
Federer to face Djokovic in group stages in ATP World Tour Finals as Nadal handed Ferrer test | Daily Mail Online
![ATP World Tour Finals: Novak Djokovic to take on Roger Federer in dream final | Tennis News | Sky Sports ATP World Tour Finals: Novak Djokovic to take on Roger Federer in dream final | Tennis News | Sky Sports](https://e0.365dm.com/14/11/2048x1152/tennis-novak-djokovic-roger-federer-atp-world-tour-final_3229446.jpg)