World number one Andy Murray will open his ATP World Tour Finals campaign against Marin Cilic on 14 November.
The Briton hopes to win the season-ending event for the first time and end 2016 at the top of the rankings, having replaced Novak Djokovic on Monday.
Murray will take on Stan Wawrinka, Kei Nishikori and Cilic in the round-robin stage at London's O2 Arena.
Five-time champion Djokovic will face Milos Raonic, Gael Monfils and Dominic Thiem in the other group.
Djokovic will play Austria's Thiem in the opening singles match, not before 14:00 GMT on Sunday, 13 November, while Murray plays Cilic not before 20:00 the following day.