Andy Murray will be turning to home comforts next week to try to hold off the challenge of Novak Djokovic for the year-end world No 1 position. With the Barclays ATP World Tour Finals starting on Sunday, the 29-year-old Scot almost certainly needs to equal or do better than his rival over the next eight days. That means Murray, who begins against Marin Cilic on Monday, may well have to improve on his curiously modest match record of 8-10 since this event moved to the O2 Arena in 2009.