At the World Series of Darts Finals, Wade defeated debutant Ross Smith 6–3 in the first round. He then defeated hometown favorite Mensur Suljović 6–3 in the second round and Jamie Lewis 10–5 in the Quarter-Finals, continuing his excellent stretch of form. It was the first time since 2011 that Wade won 8 consecutive TV major matches. In the Semi-Finals, Wade dispatched 5-time World Champion Raymond van Barneveld 11–2 in a high quality affair in which Wade averaged 100 and hit 65% of his doubles. This win stretched Wade's unbeaten TV run to 9 matches, the first time he had achieved this feat since 2008. In the Final, Wade played Michael Smith. Wade got off to a 3-leg advantage but Smith would peg him back to 5–5 before the second break. Wade would go onto break Smith in the 19th leg to serve the title out at 10–9 but he busted his score of 121, and Smith eventually came back and won the leg. In the decider, Smith missed 5 match darts and Wade sealed the title on D18. The tournament victory was Wade's second major in 7 days, and the 10th of his career. It was also Wade's first World Series Title. Wade's tournament victories sealed his place in the 2018 Grand Slam of Darts where he drew Keegan Brown, Mark Webster and Wesley Harms to comprise Group C. Wade won his opening group match, whitewashing BDO player Wesley Harms 5–0 with a 99 average. In his second group game, Wade defeated Keegan Brown 5–3, averaging 105. In doing so, Wade set a new personal record of 12 TV major wins in succession. Wade defeated Mark Webster 5–1 with a 102 average in the final group match to top the group, extending his unbeaten run to 13 matches and setting up a Round of 16 showdown with Michael Unterbuchner. Wade lost, rather surprisingly, to Michael Unterbuchner 10–6.