Maguire whitewashed Judd Trump 5–0 to reach the quarter-finals of the 2014 Wuxi Classic where he lost 5–4 against Martin Gould, despite making the tournament's highest break of 145.&lt;ref name="2014/15"&gt;&lt;/ref&gt; In September 2014 he won the Six-red World Championship defeating Ricky Walden 8–7 in the final. However, he failed to advance beyond the second round in the three major ranking events following Wuxi and when Maguire lost 4–1 to Trump in the opening round of the Champion of Champions he hinted at retiring from the game. When he came back from 3–0 down against Yu Delu to win 6–4 in the second round of the UK Championship he remarked that he might seek the help of a sports psychologist in the future. Maguire then beat Mark Williams 6–2, David Morris 6–3 and Marco Fu 6–4 to play in his first major ranking event semi-final in over a year. He faced Trump once again and lost the first four frames as well as being 5–1 behind. Maguire pulled the deficit back to a single frame and had chances to send the match into a deciding frame, but went in-off when escaping a snooker on the colours and would lose 6–4. A week later Maguire continued his recent resurgence of form to win the inaugural Lisbon Open, the first professional snooker event to be staged in Portugal, by beating Matthew Selt 4–2 in the final. During the German Masters, Maguire stated that he had regained his confidence and it would take something special to stop him. He needed two snookers in the deciding frame of his quarter-final match with Neil Robertson and got them when he accidentally potted the black. In Maguire's second consecutive ranking event semi-final he was defeated 6–2 by Mark Selby. He advanced to the quarter-finals of the Welsh Open without facing a top-16 player, and lost 5–1 to John Higgins.