Murray in tough ATP World Tour Finals group

New world number one Andy Murray has been grouped with Stan Wawrinka, Kei Nishikori and Marin Cilic for next week's season-ending ATP World Tour Finals in London.

On Monday, Murray claimed the number one ranking spot for the first time ending Novak Djokovic's 122-week reign and will start his group round-robin matches against Croatian Cilic this upcoming Monday at the O2 Arena.

For the second-seeded Djokovic, things look slightly easier as he has been grouped with tournament debutants Gael Monfils, Dominic Thiem and Canada's Milos Raonic.

What makes Djokovic the likely group winner is the fact that he has never lost to any of the players in his group before with a 23-0 record (Thiem 3-0, Monfils 13-0 and Raonic 7-0).

The Serb will be in action on Sunday in his opening match against Austria’s Thiem.

Murray has a 405-point lead over Djokovic in the race to finish the year ranked in the top spot and with 1,500 points on offer for an undefeated champion next week there is the potential of a final face-off between Murray and Djokovic for the year-end number one ranking.

Full draw: (world ranking in brackets)
*Top two players from each group contest semi-finals

John McEnroe Group:
Andy Murray (Britain) (1)
Stan Wawrinka (Switzerland) (3)
Kei Nishikori (Japan) (5)

Ivan Lendl Group:
Novak Djokovic (Serbia) (2)
Milos Raonic (Canada) (4)
Gael Monfils (France) (6)
Dominic Thiem (Austria) (9)