Sue Barker presents live coverage of the ATP Tour Finals at the O2 Arena in London as Andy Murray and Milos Raonic compete in the first semi-final. The tournament is the climax of the season and features the world's top eight players.

Novak Djokovic has won the last four end-of-season titles and is looking to put a recent dip in form behind him, but could Andy Murray round off a sensational year with another trophy to add to his Wimbledon and Olympic triumphs?

Commentary by Andrew Castle and Tim Henman. Show less