 Muirs first match as a professional was a 51 loss against two-time world champion Mark Williams in qualifying for the 2013 Wuxi Classic. Kukunda kwake kwekutanga kwakauya mukukwikwidza kwechiitiko chinotevera, iyo Australian Goldfields Open, nekukunda James Cahill naRod Lawler vese 51, vasati varasikirwa ne52 kuna Liam Highfield. Pamutambo weAsia Tour, Zhangjiagang Open, akakunda nhamba yechinomwe yenyika Ding Junhui 43 mu32 yekupedzisira nekunyora kuputsa kwe80 mufuremu yekupedzisira, asati aputirwa 40 naDa Hailin mumutambo unotevera. Muir haana kukwanisa kukunda mumutambo wechikamu chechikamu chekupedzisira mumwaka wose kusvikira pakupedzisira, World Championship, apo akakunda David Grace 106, asi akabva arasikirwa ne105 naNigel Bond mumutambo wakatevera. Muir akapedza mwaka wake wokutanga parwendo rukuru ari nhamba 113 yenyika. 