Roger Federer and Andy Murray in same group for ATP World Tour Finals in London

The groups for the ATP World Tour Finals in London has been revealed and features eight tennis aces for the season-ending tournament.

The eight tennis stars have been divided into two groups of four each and they would compete against each other to progress to the semifinals, with the standings based initially on match wins, although it could come down to percentage of games won or world rankings as final tie-breaker.

World number one and top seed Novak Djokovic, Switzerland's Stanislas Wawrinka, Czech's Tomas Berdych and Marin Cilic of Croatia are in Group A, The BBC reported.

Djokovic is enjoying the golden days of his tennis career, and has just won the Paris Masters after becoming a father.

Britain's number one Andy Murray has been drawn in the same group as Roger Federer for the ATP World Tour Finals in London.

Murray is in Group B with world number two Federer, Japan's Kei Nishikori and Canadian Milos Raonic.

Murray would open play at the O2 on Sunday against Nishikori, followed by Federer against Raonic, while Wawrinka and Berdych would begin proceedings on Monday, with Djokovic and Cilic in the evening session, the report added.