At the World Cup of Darts, Van Barneveld and Van Gerwen produced a sensational 117.88 average in their doubles decider against Northern Ireland to whitewash them 4–0 and meet England's Taylor and Lewis in the final. Van Gerwen defeated Taylor 4–0 and Van Barneveld recorded the same scoreline against Lewis. Van Gerwen went into his singles match versus Lewis knowing a win would earn the Dutch pair the title and he did so with a 4–2 success. Early on in his second round match against Mervyn King at the World Grand Prix, Van Barneveld was visibly struggling with a back problem but battled to trail 2–1 in sets. However, in the fourth set he missed 30 starting doubles and began throwing at the bullseye. King duly won the match, with Van Barneveld issuing an apology to the PDC and the television viewers for giving up. At the next major event, the European Championship, Van Barneveld wore glasses during a match for the first time in his career and explained after his 6–4 first round win over Simon Whitlock that his diabetes can occasionally blur his vision. He won through to the semi-finals, but was beaten 11–6 by Van Gerwen who threw a nine darter during the game. The pair also met in the next televised event the Masters, in a first round match which went to a deciding leg with Van Gerwen leaving 32 after nine darts and edging Van Barneveld 10–9. He lost to newcomer Keegan Brown 10–7 in the last 16 of the Grand Slam and was drawn to face Van Gerwen in the first round again this time at the Players Championship Finals where he was defeated 6–2.