Day four of the 2017 IIHF Women’s World Championship tournament was the quarterfinals. As the top two ranked teams in the tournament, the United States and Canada had automatic byes to the semifinals. This meant the quarterfinal matchups were Finland playing Sweden, at 2:30pm CT, for a chance at Canada and Germany facing Russia, at 6:30pm CT, for a shot at the US. As Switzerland and the Czech Republic were the bottom two teams in the tournament, they will play each other in a series of three relegation games. Their first match up was at 11:00 am CT. All three of the day’s games occurred in the main rink at USA Hockey Arena in Plymouth, Michigan.