Andy Murray will begin a challenging end to his season when he takes on Spain's David Ferrer at the ATP World Tour Finals on Monday.
The pair will meet in their opening round-robin match at London's O2 Arena at 14:00 GMT.
Switzerland's Stan Wawrinka and Rafael Nadal of Spain play in the day's other singles match at 20:00.
Murray could play five matches before going to Belgium for Britain's first Davis Cup final since 1978 next week.
He has an 11-6 record against Ferrer, having won their last four matches including a straight-sets victory in Paris earlier this month, but has made the semi-finals only twice in five appearances in London.