Mezue ahịrịokwu na-esonụ: Mgbe ọ nọchitere anya Czech Republic n'ọtụtụ ndị na-eto eto, Souček mere egwuregwu mbụ ya maka ndị okenye na 15 Nọvemba 2016 na egwuregwu enyi na enyi megide Denmark. O mere asọmpi mbụ ya na 10 June 2017, na Czech Republic 1<unk>1 pụọ draw megide Norway na 2018 World Cup qualifier. Souček pụtara n'egwuregwu atọ nke Czech Republic n'okpuru egwuregwu 21 n'egwuregwu
2017 UEFA U-21 Championship.