In the qualifying rounds of the 2014 Australian Goldfields Open, Leslie beat Hammad Miah 5–4 and Sam Baird 5–3 to play in the final round, but was narrowly eliminated 5–4 by Marcus Campbell.&lt;ref name="2014/15"&gt;&lt;/ref&gt; Later in the season after losing eight matches in a row, Leslie recorded the result of his career to date by defeating Mark Allen, a player ranked 106 places above him in the rankings, 5–1 to qualify for the China Open. There, he reached the last 32 of a ranking event for the first time with a 5–1 victory over Joe O'Connor, but was thrashed 5–0 by Mark Williams.