Britain’s Andy Murray has been drawn in the same group as Roger Federer for the ATP World Tour Finals in London.
Murray will open play at the O2 at 14:00 GMT on Sunday against Nishikori, followed by Federer against Raonic at 20:00.
Murray, 27, has won three titles in the past six weeks to qualify for the eight-man season-ending tournament, which takes place from 9-16 November.
The Scot is in Group B along with Swiss second seed Federer, Japan’s Kei Nishikori and Milos Raonic of Canada.
Top seed Novak Djokovic, Switzerland’s Stan Wawrinka, Czech Tomas Berdych and Marin Cilic of Croatia are in Group A.
Wawrinka and Berdych begin proceedings on Monday, with Djokovic and Cilic in the evening session.