Whitlock won his first two matches in the 2013 World Championship without dropping a set and then in a deciding set against Dave Chisnall, he took out a crucial 152 checkout to stay in the match, following it up with two successive legs to advance to the quarter-finals. However, he ran into an in-form Raymond van Barneveld who averaged 102.32 in defeating the Australian 5–1. In his third World Cup of Darts with Paul Nicholson the pair were shocked in the last 16 when the Belgian brothers of Ronny and Kim Huybrechts defeated them 1–5.