He was considered a "blue-chip" first-round talent that dropped to the third round of the 2008 NHL Entry Draft due to his contract status at the time with Ak Bars.

He was considered a "blue-chip" first-round talent that dropped to the third round of the 2008 NHL Entry Draft due to his contract status with Ak Bars Kazan of the Kontinental Hockey League (KHL).

There was a real possibility of him joining the New York Islanders of the National Hockey League (NHL) for the 2010–11 season.

[2] However, following 13 games with the Islanders' minor league affiliate, the Bridgeport Sound Tigers, Petrov returned to Russia to play for CSKA Moscow.

[3] After a lone season with Avangard, Petrov returned to Ak Bars Kazan as a free agent, securing a one-year contract on 7 May 2019.