Luke Littler: World No 1's success is 'ridiculous' but judge him at the World Championship, says Wayne Mardle

Luke Littler defended his title at the Grand Slam of Darts with a 16-11 victory over Luke Humphries; He also took the world no 1 spot from his rival; watch the World Darts Championship live from Alexandra Palace from December 11 to January 3, live on Sky Sports