The 18-year-old native of Burgwedel, Germany has spent the last two seasons with the Charlottetown Islanders of the QMJHL. In 2017-18, he posted 13 goals and 18 assists (31 points) in 66 games. Last season he nearly doubled his production, netting 27 goals and 34 assists (61 points) in 64 games.
Alexandrov was drafted by the Blues with the team's first pick (2nd round, 62nd overall) in the 2019 NHL Draft.