Novak Djokovic will face Roger Federer in his group at the ATP World Tour Finals in London.
The Serb has won the tournament for the last three years and is enjoying a fantastic 2015, with his record standing at 78-5, encompassing three grand slam titles - as well as a final appearance at the French Open.
Federer wlll be chasing the title for the seventh time and has won six titles this year.
World number two Andy Murray will meet Rafael Nadal, who makes his 11th appearance in the competition after missing out last year due to appendicitis.
The competition begins at The O2 in London on November 15, with the final scheduled to take place one week later.
Stan Smith Group: Novak Djokovic, Roger Federer, Tomas Berdych, Kei Nishikori.
Ilie Nastase Group: Andy Murray, Stan Wawrinka, Rafael Nadal, David Ferrer.