beneficial for his career. He had an extremely positive season at Joventut. Prepelič played 15 games in the 2019–20 EuroCup Basketball, averaging 17 points, 4 assists and 2.3 rebounds. In 27 games in the 2019–20 ACB season he averaged 22.5 points, 3 assists and 1.7 rebounds. Prepelič was the top-scorer of the 2019-20 ACB regular season, and the third most valued player with 19.6 credits. He was one of the top-five players of the season, and the best in his position. He was the third-best scorer in the 2019–20 EuroCup, ranking first in free throws made (5.5) and fouls drawn (7.1). Prepelič led Joventut to a win in their 2020 EuroCup debut against Brescia. He scored 5 points to bring the score from 41–41 to 46–43. Soon Prepelič converted another and-one opportunity for 8 points. Prepelič scored and assisted again, getting Joventut back on track in the 4th quarter with the first score and also scoring a big three-pointer to restore the double-digit lead. Brescia recovered again, but Prepelič closed the game with another three-pointer and two consecutive assists. With a PIR of 25, thanks to 24 points, 4 rebounds and 5 assists, he was the best performer of the game. He was again the top performer in Joventut's second win against Darüşşafaka, when he first brought the score from 9–10 to 13–10 in the 1st quarter, then stole a ball and dished out two assists to recover from a 6-point deficit in the 2nd quarter. In the last minute of the game, he draw a foul and made 3 out of 3 free throws to bring the score to 82–82, and finally won the game with a buzzer-beater from his own foul line. He recorded 30 points, 4 assists and 2 rebounds for a 35 PIR in the second leg against Darüşşafaka, eventually lost 92–86 by Joventut. He was the scoring and assists leader against his former club Olimpija, in Joventut's third win in the 2020 EuroCup. Scoring 15 points, Prepelič was the scoring leader in Joventut's win over BC UNICS. He instantly put his team ahead 8–2, scoring 6 points in the first minute and a half. As his team was down 47–51 in the 3rd quarter, he scored a three-pointer and dished out an assist to put Joventut ahead 53–51. They kept ahead until the end, eventually winning 90–73. He led his squad to a 88–84 comeback