Canada and the ROC faced off in their women's ice hockey match Monday with both teams wearing face masks underneath their helmets.
The masks didn't appear to hinder the performance of the Canadians, however, who won the game 6-1.
The Group A preliminary round fixture got started after an hour's delay, when the players entered the ice wearing masks due to "safety and security concerns," Reuters reported, citing a communique to the International Ice Hockey Federation (IIHF) from the International Olympic Committee (IOC).
In the third period, it appeared the ROC team returned to the ice maskless.
It comes after the ROC women's ice hockey team were put into quarantine due to several players contracting Covid-19, the Russian Ice Hockey Federation said in a news release on Wednesday.
The whole team went into quarantine on Jan. 31 due to positive PCR tests among several players. Those players were subsequently isolated from the rest of the ROC contingent.
The ROC ice hockey team was subsequently cleared to play in the Winter Games.