 Dončić akaita mutambo wake wekutanga mumwaka wenguva dzose musi waGumiguru 17, 2018, achinyora mapoinzi gumi, masere rebounds, uye mana anobatsira, mukurasikirwa kwe121 100 kuPhoenix Suns. Musi waGumiguru 20, Dončić akarekodha 26 mapoinzi uye 6 rebounds mukukunda 140136 pamusoro peMinnesota Timberwolves. Akava muduku pane vose vakagovera zvibodzwa 20 munhau yechikwata chacho. Musi waGumiguru 29, Dončić akaisa 31 mapoinzi uye 8 rebounds mukurasikirwa ne113108 kuSan Antonio Spurs, kumutambo wake wekutanga wemapoinzi makumi matatu muNBA. Akanyora rake rekutanga NBA kaviri-kaviri musi waNovember 19, aine mapoinzi gumi nemashanu uye gumi rebounds mukurasikirwa 98 88 kuMemphis Grizzlies. Dončić akatumidzwa zita reNBA Rookie yeMwedzi muWestern Conference munaNovember 2018. Musi waDecember 8, Dončić akawana 21 points mukukunda 107104 pamusoro peHouston Rockets. Mushure mekurwisana kwekutanga, akaburitsa run 110 mumaminetsi ekupedzisira emutambo. Musi waDecember 28, Dončić akawana 34 points uye akava mutambi muduku weNBA kuita manomwe matatu-pointers mumutambo. Akatumidzwa zita reWestern Conference Rookie yeMwedzi waDecember 2018. Musi waNdira 21, Dončić akarekodha yake yekutanga NBA katatu-kaviri aine 18 mapoinzi, 11 rebounds, uye gumi anobatsira mukurasikirwa 116106 kuMilwaukee Bucks, izvo zvakamuita wechitatu-mudiki mutambi munhoroondo yeNBA kuita basa iri pa19 makore nemazuva 327, kumashure LaMelo Ball naMarkelle Fultz. Musi waNdira 27, Dončić akarova mwaka wepamusoro-soro 35 mapoinzi uye akarekodha yake yechipiri NBA katatu-kaviri achiwedzera gumi nemaviri rebounds uye gumi anobatsira mukurasikirwa 123 120 kuToronto Raptors. Akava wechiduku wokutanga munhoroondo yeNBA ane 30-pfungwa katatu-kaviri uye ane akawanda matatu-kaviri. Mazuva maviri gare gare, Dončić akatumidzwa zita rekuti mutambi akasimbiswa weWorld Team mu2019Dambudziko reNyeredzi Dzinokwira. Kunyangwe ari wechipiri mukuvhota kwevateveri, kuseri kwaLeBron James chete, uye akaiswa pachinzvimbo chechisere muhuwandu hwekuvhota, Dončić haana kusarudzwa kuWestern Conference All-Stars mu2019 NBA All-Star Game. 