Djokovic first to qualify for ATP World Tour Finals
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
File:2013 ATP World Tour Finals Berdych vs Ferrer.jpg - Wikimedia Commons
How Roger Federer's Success Built the ATP World Tour Finals | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
The ATP Finals Say Goodbye to London - The New York Times
Nick Kyrgios to Play Three More Tournaments as He Targets Atp World Tour Finals Qualification - EssentiallySports
ATP Tour Championship Tennis - Wikipedia
ATP World Tour Finals 2013: Roger Federer sets up semi-final with Rafael Nadal after coming from behind to beat Juan Martin del Potro | The Independent | The Independent
Tennis - Barclays ATP World Tour Finals - 02 Arena, London - 6/11/12 Men's Singles - General view of Serbia's Janko Tipsarevic and Switzerland's Roger Federer (L) during their Group B round
Dominic Thiem Suffers Blow to ATP World Tour Finals Hopes | Tennis News
Nadal makes last four at ATP Finals - China.org.cn
ATP World Tour Finals: Stanislas Wawrinka to face Roger Federer in semi- finals | Tennis News | Sky Sports
Daniil Medvedev reaches championship match at ATP Finals | Tennis News - Hindustan Times
2009 ATP World Tour - Wikipedia
Novak Djokovic Wins 90th Career Title Over Tsitsipas, Looks Like Player To Beat At World Tour Finals
Rashmika sends Zeel toppling at KSLTA ITF Women's World Tour Championship - Social News XYZ
Novak Djokovic loses to Janko Tipsarevic at ATP World Tour finals | ATP World Tour Finals 2011 | The Guardian
ATP Finals - Wikipedia
World Tour Finals - Tennis news & results - Eurosport
ITF Masters Tour World Championships | ITF
Djokovic downs debutant Ruud for winning start at ATP Finals | Sports | China Daily
