Muir's first match as a professional was a 5<unk>1 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 5<unk>1, vasati varasikirwa ne5<unk>2 kuna Liam Highfield. Pamutambo weAsia Tour, Zhangjiagang Open, akakunda nhamba yechinomwe yenyika Ding Junhui 4<unk>3 mu32 yekupedzisira nekunyora kuputsa kwe80 mufuremu yekupedzisira, asati aputirwa 4<unk>0 naDa Hailin mumutambo unotevera. Muir haana kukwanisa kukunda mumutambo wechikamu chechikamu chekupedzisira mumwaka wose kusvikira pakupedzisira, World Championship, paakakunda David Grace 10<unk>6, asi akarasikirwa ne10<unk>5 kurwisana naNigel Bond mumutambo unotevera. Muir akapedza mwaka wake wokutanga parwendo rukuru ari nhamba 113 yenyika.