Luke Littler begins his Grand Slam of Darts title defence with a comfortable 5-2 win over Beau Greaves in Wolverhampton. LUKE Littler made an explosive start to his Grand Slam of Darts defence as he scorched past Beau Greaves. Warrington’s back-to-back world champion has never lost in the Grand Slam in Wolverhampton. Luke Littler opened his Grand Slam of Darts title defence by beating Beau Greaves 5-2 in Wolverhampton.