Kammala jumla mai zuwa: Bayan yin ritaya a ƙarshen kakar 2018/2019, bayan wasu ci gaba a cikin lafiya, ya dawo ya yi gasa a wasu daga cikin na biyu, Challenge Tour. Yanzu wani mai son a matsayi, Muir ya iya shiga
2020 Masters na Turai, amma ya rasa a zagaye na farko na cancantar zuwa Kurt Maflin, 5<unk>2. Muir ya kai wasan kusa da na karshe na 2020 WSF World Championship a Malta da EBSA European Championship a Portugal.