in the Players Championship Finals, before losing 9–5 to Anderson in the second round. 2014 Klaasen played Jamie Caven in the first round of the 2014 World Championship and lost 3–1 as he hit just 17% of his darts at doubles. At the German Darts Championship he reached the semi-finals of a European Tour event for the first time by defeating Michael van Gerwen 6–5 in the quarters. He played Justin Pipe and was denied a place in the final as Pipe took out a 134 finish in the deciding leg. Klaasen was narrowly beaten 9–8 by Andy Hamilton in the third round of the UK Open. At the European Championship, Klaasen knocked out reigning champion Adrian Lewis 6–4 in the first round and Caven 10–7 to reach the quarter-finals for the second year in a row, where he lost 10–5 to Mervyn King. Klaasen averaged 108.74 in beating James Wade 6–4 in the first round of the Players Championship Finals, but then averaged nearly 20 points lower as he missed 22 doubles in the next round against Dean Winstanley to be beaten 10–5. 2015 Klaasen met Gary Anderson in the second round of the 2015 World Championship after seeing off compatriot Christian Kist 3–1. Klaasen went 3–1 up and was two legs to one ahead in the next set, before Anderson took out 84 on the bull with Klaasen waiting on 89 for the match. Anderson sealed the set in the next leg and won the final two sets by three legs to one scorelines to win 4–3. Both players averaged over 100 with 20 180s thrown during the match. Klaasen defeated Phil Taylor 6–2 at the fourth UK Open Qualifier to play in his first final in almost two years. However, he missed 10 match darts to slip from 5–2 ahead of Michael van Gerwen to lose 6–5. At the UK Open, Klaasen beat Brendan Dolan 9–4, before losing 9–5 to Andrew Gilding in the fourth round. Klaasen recorded successive wins over Adrian Lewis, Mervyn King and Simon Whitlock to reach the final of the 12th Players Championship where, after taking the opening leg, he was beaten 6–1 by Peter Wright. Klaasen reached his third final of the year at the 14th Players Championship and won his first title in nearly eight years by beating Ian White 6–2. He was knocked out 10–4 by Whitlock in the first