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. 2014–15 season Un-Nooh qualified for the International Championship for the second year in a row, but was edged out 6–5 by Fergal O'Brien in the first round. He also lost in a deciding frame in the first round of the UK Championship against Robin Hull, despite making breaks of 137 and 117 during the match. Un-Nooh won five games to reach the semi-finals of the Xuzhou Open where he beat Mark Williams 4–1 to play in his first final in a professional event. He was defeated 4–1 by Joe Perry, but he described Un-Nooh as an exceptional talent after the match. Un-Nooh defeated defending champion Ding Junhui in the first round of the Indian Open, calling it his biggest win after the match. He also stated that he didn't feel he could win the title. Nevertheless, he whitewashed Luca Brecel 4–0 and then recorded wins over Jamie Jones and Mark Davis to reach the semi-finals of a ranking event for the first time. Un-Nooh compiled a trio of half-century breaks to race into a 3–0 lead over Ricky Walden, but went on to lose 4–3. His Asian final saw him finish fourth on their Order of Merit to make his debut in the Grand Final, where he was knocked out 4–1 by Mark Williams in the first round.