 Complete the following phrase:  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 40 and meet Englands Taylor and Lewis in the final. Van Gerwen defeated Taylor 40 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 42 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 21 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 64 first round win over Simon Whitlock that his diabetes can occasionally blur his vision. He won through to the semi-finals, but was beaten 116 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 109. He lost to newcomer Keegan Brown 107 in the last 16 of the 