Risacher entered the youth program for ASVEL Basket in 2020. He primarily played for the team's club in LNB Espoirs, the French under-21 league.
He made his debut in the senior league in 2021 against Boulogne-Levallois. He also made his EuroLeague debut later in the season. Risacher averaged 12.5 points and 4.4 rebounds in LNB Espoirs competition.
In June of 2023, Risacher signed his first professional contract with ASVEL, but was immediately loaned to JL Bourg for the 2023-2024 season. On November 29, 2023 he was named to Team France of the LNB All-Star Game.
He averaged 10.4 points and 4.4 rebounds leading France to the bronze medal in the 2022 FIBA Under-17 Basketball World Cup.