Un-Nooh knocked out world number one Mark Selby 5–3 in the second round of the World Open, and then whitewashed Alan McManus 5–0 and beat Anthony McGill 5–2. In the semi-finals he suffered a 6–1 loss to Ali Carter. In the third round of the Paul Hunter Classic against Kurt Maflin, Un-Nooh finally made his first professional 147 break, after twice missing the final black the previous season. It earned him £40,000, and he won the match 4–1 before then narrowly beating Mark Allen and David Grace both 4–3, to reach the semi-finals of a ranking tournament for the second successive event. Un-Nooh lost 4–2 against Tom Ford. He struggled to build on this afterward, for he could not win a first-round match until the 2017 Welsh Open, in which he beat Ben Woollaston 4–0 and then saw off Ryan Day 4–1, before being defeated 4–1 by Barry Hawkins.&lt;ref name="2016/17"&gt;&lt;/ref&gt;