Sixteen-year-old Luke Littler became the youngest-ever player to reach the semi-finals of the World Darts Championship with a 5-1 win over Brendan Dolan at Alexandra Palace on Monday. Littler had a nervous start, losing the first two legs of the opening set, but the teenager soon found his stride to win that first set, and had little trouble in seeing off 50-year-old Dolan from Northern Ireland.