Un-Nooh lost in the qualifying rounds for the first four ranking events of the 2013–14 season, but then beat Gerard Greene 6–5 to reach the International Championship in Chengdu, China.&lt;ref name="2013/14"&gt;&lt;/ref&gt; In his first appearance in the main draw of a ranking event he thrashed Zhang Anda 6–1, before losing by the same scoreline to Neil Robertson in the last 32. However, the experience seemed to kick start Un-Nooh's season as in 2014 he played at the venue stage of four of the remaining six ranking events. He beat Ronnie O'Sullivan 5–4 in qualifying for the German Masters, with the reigning world champion playing high risk exhibition shots throughout the match, but Un-Nooh was whitewashed 5–0 by Jack Lisowski in the first round. At the World Open, Un-Nooh led Stephen Maguire 3–0, before the world number eight rallied to win four frames in a row. The match went into a deciding frame in which Un-Nooh made a break of sixty, only for Maguire to get a chance to win but then miss the final brown, handing Un-Nooh a big scalp. He then reached the last 16 of a ranking event for the first time by beating Andrew Higginson 5–1 and lost 5–2 to Graeme Dott, despite missing the final pink when on a 147 break during the match. Un-Nooh advanced to the last 32 of the China Open by whitewashing 1997 world champion Ken Doherty 5–0, before losing 5–3 against Ding Junhui. His performances during the campaign saw him end it in the top 64 in the world rankings for the first time as he was placed 59th.