Koperberg was born in Saint Petersburg, Russia, and was adopted by an Israeli family[citation needed] a few months after his birth.

[1] That season, Koperberg participated at the Israeli League All-Star Game and the Slam Dunk Contest.

At the same day, he was loaned to Hapoel Afula of the Israeli National League for the rest of the season.

[3] On December 30, 2019, Koperberg signed a three-year deal with Hapoel Tel Aviv.

[5] In July 2017, Koperberg helped the Israeli Under-20 national team to reach the 2017 FIBA Europe Under-20 Championship finals by averaging 10.7 points and 6.9 rebounds per game.