Andy Murray defeats Marin Cilic on bow as world number one at ATP Finals

Andy Murray began his reign as world number one with an impressive straight sets victory over Marin Cilic at the ATP World Tour Finals at The O2 Arena. In his first match as the official king of men's tennis the Wimbledon and Olympic champion claimed a 6-3 6-2 win over Cilic whose wait goes on for success at the season-ending tour finals in London. In an opening set littered with errors it was Murray who was able to show the greater consistency with the Croatian Cilic unable to hurt the Scot suf