In a match lasting almost seven hours, Muir beat experienced campaigner Alan McManus 6–5 to qualify for the International Championship. It was the first time he played in a ranking event outside of the UK and he lost 6–5 to Thepchaiya Un-Nooh in the first round. Muir stated that he had been using a mind coach to help with the psychological side of the game. He won a match at the venue stage of a ranking event for the first time by edging past Mark King 6–5 at the UK Championship. The deciding frames kept coming for Muir but it was Ben Woollaston who would triumph 6–5 in the second round. He also played in the second round of the Welsh Open because of Jamie Burnett's withdrawal and lost 4–3 to Graeme Dott. Muir whitewashed Burnett 5–0 to qualify for the China Open and was knocked out 5–4 by Robert Milkins in the opening round. In the first round of the World Championship qualifying Muir beat Sean O'Sullivan 10–5, before losing to Ding Junhui 10–1 in the second round.