Nadal, Djokovic headline groups for ATP World Finals
{{#rendered}} {{/rendered}}London, England (SportsNetwork.com) - Rafael Nadal and Novak Djokovic will headline the two groups for the season-ending ATP World Tour Finals.
The exclusive field of eight will play in round-robin groups starting Monday in London.
Nadal, the world's top-ranked player, will top Group A. He will be joined by fellow Spaniard David Ferrer, Tomas Berdych of the Czech Republic and Stanislas Wawrinka of Switzerland.
{{#rendered}} {{/rendered}}Djokovic, ranked second in the world, will play in Group B with Argentina's Juan Martin del Potro, Swiss superstar Roger Federer and Frenchman Richard Gasquet.
Nadal has never won the season-ending tournament, falling to Federer in the 2010 final. Federer is a six-time champion and last year lost to Djokovic in the title match. Djokovic also won the crown in 2008.