Buuxi weedha soo socota: Fiala wuxuu ka ciyaaray Ivan Hlinka Memorial Tournament sannadihii 2012 iyo 2013 isagoo xubin ka ahaa xulka qaranka Switzerland ee U18. Waxa kale oo uu dalkiisa u ciyaaray tartanka caalamiga ah
2014 Horyaalka Hockey-ga Qabowga ah ee Junior-ka Adduunka, halkaas oo lagu amaanay inuu yahay mid ka mid ah ciyaartoyda muhiimka ah ee liiska Switzerland. Shan kulan oo WJC ah, wuxuu diiwaan geliyay hal gool iyo afar caawin, maadaama Switzerland ay ka baxday Kanada wareega afar dhamaadka. Bishii Maajo 2014, Fiala wuxuu matalayay Switzerland 2014 IIHF World Championship ee Belarus, isagoo diiwaan galiyay laba caawin toddobo kulan. Fiala wuxuu ahaa ciyaaryahankii seddexaad ee taariikhda ka ciyaara ka yar 18 sano, World Junior, iyo World Championship isla sanadkaas (labadii hore waxay ahaayeen Andrei Kostitsyn iyo Vadim Karaga, labaduba waxay la ciyaareen Belarus 2003). Fiala ayaa sidoo kale ka qeyb gashay 2018 IIHF World Championship, halkaas oo Swissku ku guuleystay lacag. Finalka ay Sweden la ciyaareen Fiala wuxuu fursad u helay inuu dahabka ku guuleysto waqti dheeri ah laakiin toogashadiisu aad ayey u hooseysay. Kadib guuldaradii ka soo gaartay is rasaasayntii Swiss-ka waxay ku khasbanaadeen inay ku qancaan lacag.