 Nyora kuenderera mberi kweiyi ndima - Hertl akabatana neCzech Republic ku2011 IIHF World U18 Championships, achihwina chibodzwa chimwe, sezvo chikwata chakapedza chiri chechisere. Gore rakatevera, Hertl akapinda mu2012 World Junior Ice Hockey Championships yeCzechs, achihwina zvibodzwa zvitatu uye zviviri zvinobatsira, nechikwata chakapedza chechishanu. Akazotamba mu2013 edition, umo chikwata cheCzech chakapedza chechishanu. 