9 ▁January , ▁he ▁left ▁the ▁Sh arks ' ▁game ▁against ▁the ▁Can uck s ▁with ▁what ▁was ▁revealed ▁to ▁be ▁season - ending ▁tears ▁to ▁the ▁A CL ▁and ▁M CL . ▁ ▁International ▁play ▁H ert l ▁joined ▁the ▁Czech ▁Republic ▁at ▁the ▁ 2 0 1 1 ▁II H F ▁World ▁U 1 8 ▁Championships , ▁scoring ▁ 1 ▁goal , ▁as ▁the ▁team ▁finished ▁e ighth . ▁The ▁next ▁year , ▁H ert l ▁participated ▁in ▁the ▁ 2 0 1 2 ▁World ▁Junior ▁Ice ▁Hockey ▁Championships ▁for ▁the ▁C ze chs , ▁scoring ▁ 3 ▁goals ▁and ▁ 2 ▁ass ists , ▁with ▁the ▁team ▁finishing ▁fifth . ▁He ▁eventually ▁played ▁in ▁the ▁ 2 0 1 3 ▁edition , ▁in ▁which ▁the ▁Czech ▁team ▁finished ▁fifth . ▁ ▁H ert l ▁played ▁with ▁the ▁Czech ▁Republic ▁at ▁the ▁ 2 0 1 3 ▁II H F ▁World ▁Championship , ▁where ▁he ▁was ▁the ▁young est ▁player ▁on ▁the ▁team . ▁Due ▁to ▁the ▁kne e ▁injury ▁against ▁the ▁Kings ▁in ▁December ▁ 2 0 1 3 , ▁H ert l ▁was ▁forced ▁to ▁have ▁surg ery ▁and ▁missed ▁out ▁on ▁particip ating ▁in ▁the ▁ 2 0 1 4 ▁So chi ▁Olympics . ▁H ert l ▁returned ▁to ▁the ▁Czech ▁team ▁for ▁the ▁ 2 0 1 5 ▁II H F ▁World ▁Championship . ▁ ▁H ert l ▁was ▁selected ▁to ▁play ▁for ▁the ▁Czech ▁Republic ▁in ▁the ▁ 2 0 1 6 ▁World ▁Cup . ▁