[1][2] Both of Andriassi's older brothers, Josué and Luis, played college basketball at ITESM Hidalgo and Universidad Panamericana, respectively.
[7][8] In his only season with the Aztecas, he led them to the 2019 Liga ABE Ochos Grandes national championship tournament, which both of his brothers also participated in that year.
[3] He recorded 21 points and seven rebounds in the 86–67 win over Borregos Salvajes in the quarterfinals,[9] but his team was eliminated in the next round by his brother's school, ITESM Hidalgo.
[14] In November, he won the LNBP Three-Point Contest during the league's All-Star Weekend, defeating veterans like Ángel Daniel Vassallo, Aaron Harper and that season's MVP Luke Martínez for the title.
[14] Two weeks later, he recorded 26 points, eight assists, four rebounds, and again sank six three-pointers to beat Abejas de León by a score of 106–63, and he was named the player of the game.
Although his scoring output had increased only moderately to 7.9 points per game since the All-Star break, he had become one of the deadliest deep-ball shooters in the league with a 40% average behind the arc.
[32] Lastly, he played in the 2017 Centrobasket U17 Championship, where he averaged 23 points, 5 rebounds and 2.2 assists per game en route to a fourth-place finish.
[36] He made his international debut on February 20 during Mexico's 75–61 victory over The Bahamas in Guadalajara, finishing with six points, seven rebounds and two assists.