Andy Murray has been drawn in the same group as six-time champion Roger Federer at the ATP World Tour Finals in London.
The pair will go head to head in Group B alongside Japan's Kei Nishikori and Canadian Milos Raonic.
Meanwhile, defending champion Novak Djokovic will face Stanislas Wawrinka, Tomas Berdych and Marin Cilic in Group A.
The annual end-of-season tournament gets underway on Sunday.
