Lewis was beaten 16–8 by Gary Anderson in the quarter-finals of the World Matchplay. From 2–0 up in sets in the second round of the World Grand Prix he lost 3–2 to Kevin Painter and suffered a 6–4 defeat to Jelle Klaasen in the first round of the European Championship. Lewis' season seemed to be fading dramatically when he lost to youngsters Rowby-John Rodriguez and Keegan Brown at the Grand Slam of Darts which meant he had been eliminated from the competition before his final group game, but he returned to form at the Players Championship Finals. Jamie Caven had one dart at the bull to defeat Lewis in the quarter-finals but missed and Lewis checked out 124 and 123 in successive legs to win 10–9 and then enjoyed a more comfortable 11–6 victory against Wes Newton to play Anderson in the final in an attempt to win more than one major in the same season for the first time. However, from holding a slender 4–3 lead, Lewis lost five successive legs and was defeated 11–6.