On 11 January 2016, Tkachyov signed a four-year contract with CSKA Moscow.

[1] On 2 July 2018, Tkachyov returned to FC Arsenal Tula on a season-long loan deal.

[2] Tkachyov scored five goals in 25 Russian Premier League matches during the 2018–19 season.

[4] Lokomotiv Moscow Kuban Krasnodar Media related to Sergei Tkachyov at Wikimedia Commons

This biographical article related to a Russian association football midfielder born in 1989 is a stub.