[1] In Germany, Alexandrov played junior hockey for Iserlohner EC in the German Development League (DNL), before being drafted 50th overall by the Charlottetown Islanders for the Quebec Major Junior Hockey League (QMJHL) in the 2017 CHL Import Draft.

[3] On 4 November 2017, Alexandrov scored his first QMJHL goal and hat-trick in a 5–4 overtime win against the Sherbrooke Phoenix.

[4] Overall, he played 66 games with 13 goals and 18 assists, helping the Islanders reach the semi-finals of the 2018 QMJHL playoffs.

[8] On 23 February 2021, he scored his first professional goal in a 3–2 loss against HIFK, before finishing his season with the Utica Comets of the American Hockey League (AHL).

[9] Alexandrov represented Russia men's national junior ice hockey team at the 2020 World Junior Ice Hockey Championships, winning a silver medal.