Mezue ahịrịokwu na-esonụ: Fiala gbara na Ivan Hlinka Memorial Tournament na 2012 na 2013 dịka onye otu mba Switzerland U18. O sokwa gbaara obodo ya ọsọ n'asọmpi mbaụwa nke afọ a.
2014 World Junior Ice Hockey Championships, ebe a toro ya dịka otu n'ime ndị isi egwuregwu na Switzerland roster. N'egwuregwu ise nke WJC, o dekọtara otu ihe mgbaru ọsọ na enyemaka anọ, ka Switzerland kpochapụrụ Canada na nkeji iri na ise. Na Mee 2014, Fiala nọchitere anya Switzerland na 2014 IIHF World Championship na Belarus, na-edebanye aha abụọ na-enyere aka na egwuregwu asaa. Fiala bụ onye ọkpụkpọ nke atọ n'akụkọ ihe mere eme nke na-egwuri egwu n'okpuru afọ 18, World Junior, na World Championship n'otu afọ (ndị abụọ mbụ bụ Andrei Kostitsyn na Vadim Karaga, ha abụọ na Belarus na 2003). Fiala sonyekwara na 2018 IIHF World Championship, ebe ndị Switzerland meriri ọla ọcha. N'asọmpi ikpeazụ ha na Sweden gbara, Fiala nwere ohere iji nweta ọlaedo n'oge mgbatị mana ọgba ya dị oke ala. Mgbe ha merisịrị n'ọgụ a gbara n'etiti ha, ndị Switzerland kwetara na ha ga-enweta ọlaọcha.