Rubuta ci gaba don wannan sakin layi - Kvasnička ya bayyana a cikin wasan kadaici a kan blueline a Gasar Zakarun Duniya ta Junior ta 2017. Daga baya ya dawo don Gasar Zakarun Duniya ta 2019
a birnin Vancouver, British Columbia. Kvasnička ya ba da gudummawa tare da maki 3 a wasanni 5, yana taimaka wa Czech ta ci gaba zuwa zagaye na fitarwa, kafin shan kashi 3-1 da Amurka ta yi a ranar 2 ga Janairu 2019. An zaɓe shi a cikin manyan 'yan wasa 3 don ƙungiyar Czech a cikin matsayi na 7.