In his opening match, Duffy defeated Tony Drago 5–2 to qualify for the 2013 Wuxi Classic in China, but lost 5–3 to Lu Ning in the wildcard round. At the UK Championship Duffy beat Barry Pinches in a deciding frame to face reigning world champion Ronnie O'Sullivan in the second round.&lt;ref name="2013/14"&gt;&lt;/ref&gt; He led twice before the interval but went on to lose 6–3. His results during the year meant that he dropped 31 places to world number 91 in the rankings to drop off the tour, with Duffy entering Q School in an attempt to win his place back. He came within two victories of doing so in the second event, but lost 4–3 to Lee Walker.