Murray aims to fortify top ranking in London

Andy Murray will face Stan Wawrinka, Kei Nishikori and Marin Cilic in the ATP Tour Finals group stage as the newly crowned world No 1 looks to win the prestigious tournament for the first time.

Murray has never been past the semifinals at the season-ending event, but the Scot arrives at London's O2 Arena with a huge incentive to take the title.

The 29-year-old shattered Novak Djokovic's 122-week reign atop the world rankings by reaching the final of the Paris Masters last weekend.