[1] After two seasons playing in the KHL, Romanov was signed to a three-year, entry-level contract by the Montreal Canadiens on 13 July 2020.

[3] On 5 July 2021, he became the youngest defenseman in Canadiens history to score a goal in the Stanley Cup Finals.

[6] Romanov represented Russia at the 2019 IIHF World Junior Championship in Vancouver and Victoria, British Columbia, Canada.

He finished with one goal and seven assists, anchoring the Russian defence en route to a bronze medal.

[7] Romanov was named the best defenceman of the tournament by the IIHF Directorate and was voted to the All-Star team.