CSKA Moscow midfielder Roman Emremenko has been handed a two-year suspension after he failed a drugs test in September.
Eremenko had just competed in CSKA's Champions League fixture with Bayer Leverkusen when he was asked to take the test, but UEFA has revealed that traces of cocaine were found in his 'A' sample.
A statement read: "The UEFA Control, Ethics and Disciplinary Body (CEDB) has notified today its decision in relation to PFC CSKA Moskva player, Roman Eremenko.
"The Finnish player has been suspended for 2 years from all competitions, following the positive result of a doping control test in competition undergone by the player after the UEFA Champions League group stage match between Bayer 04 Leverkusen and PFC CSKA Moskva played on 14 September 2016 in Germany.
"The analysis of the A sample revealed the presence of cocaine and its metabolites, a stimulant that is classified under the category of prohibited substances in the World Anti-Doping Agency (WADA) 2016 Prohibited List under class S6, being prohibited in-competition.
"The player was found guilty of being in breach of the UEFA Anti-Doping Regulations, Edition 2016. As a result, the UEFA Control, Ethics and Disciplinary Body decided to impose a two-year ban on Roman Eremenko, starting from 6 October 2016 date of the provisional suspension."
Eremenko - who has scored 20 goals in 70 games for the Russian side - has the right to appeal the decision made by European football's governing body.