No. 3 Boston Bruins at No. 6 Montreal Canadiens (Bruins lead 3-2), 7 p.m. ET
If Montreal and Vancouver lose, it will be the first time since 1996 that no Canadian teams will advance to the conference semifinals.
If the Canadiens win, it will be the first time since 1995 that there have been at least four Game 7s in the conference quarterfinals. There were four in 1995.
The Bruins and Canadiens have played seven Game 7s against each other with Montreal winning five of the seven.
The last three playoff series between these teams were either sweeps or seven-game series.
There has been a combined 86 penalty minutes in the five games. During the regular season, the teams combined for 355 penalty minutes in six games against each other.
No. 7 Buffalo Sabres at No. 2 Philadelphia Flyers (Series tied 3-3), 7:30 p.m. ET
The Sabres are 0-4 in Game 7s played on the road. The only team with a worse record is the Rangers, who are 0-5 in Game 7s on the road, according to Elias.
Ville Leino's overtime goal in Game 6 was the third time in Flyers history the team staved off elimination in a best-of-7 series with an overtime win, according to Elias. Philadelphia lost in Game 7 the two previous times.
The Flyers could become the first NHL team in 23 years to win a postseason series when they started three different goalies, according to Elias.
Philadelphia has pulled its starter three times and won two of those games. According to Elias, the last time a team won two playoff games in which the starting goalie did not finish the game was the 1964 Red Wings against the Blackhawks.
The Sabres are 1-5 in playoff overtime games.
No. 8 Chicago Blackhawks at No. 1 Vancouver Canucks (Series tied 3-3), 10 p.m. ET
The Blackhawks are just the second defending Stanley Cup champion since 1995 to play in a Game 7 in the first round of the playoffs, according the Elias. The Avalanche did so in 2002, defeating the Kings 4-0 in Denver.
Only three NHL teams in history have won a best-of-7 series after trailing 3-0 in the series: the 2010 Flyers, 1975 Islanders and 1942 Maple Leafs.
This series is just the sixth instance since 1993 in which the No. 1 seed was forced to a decisive game in the conference quarterfinals, according to Elias.
Roberto Luongo will start for the Canucks, despite his struggles against the Blackhawks in the playoffs.
Luongo's goals-against average against the Hawks in the playoffs:
2007 -- 1.77
2009 -- 2.52
2010 -- 3.22
2011 -- 3.45