The Russian women's Olympic hockey team scored late to beat Japan to move on to the quarterfinals.
Alexandra Vafina scored on a breakaway with 8:24 left in the third period on Tuesday to help Russia beat Japan 2-1.
They will play unbeaten Sweden Thursday in the quarterfinals.
The US women's team is also undefeated at 2-0. They are not in the same pool as Russia.
They defeated Switzerland Monday 9-0.
The US plays Canada Thursday.