Boston hasn't lost since April 30.
The Bruins came back from two goals down to defeat the Blues 4-2 in Game 1 on Monday, when they held St. Louis to 12 shots on goal in the final two periods, including three in the second.
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"Once you see the video and see what we actually did and know that we didn't get to our game or play our game at all, it makes us feel confident in the room that we can turn the page, get back to playing the way we can, and hopefully that will lead to a win tonight," Blues center Brayden Schenn said.
Since 1939, when the Cup Final went to a best-of-7 format, teams that have a 2-0 lead have won the Stanley Cup 90.2 percent of the time (46 of 51). However, the Pittsburgh Penguins in 2009 and the Bruins in 2011 overcame being down 2-0 to win the Stanley Cup.
Here are 5 keys to Game 2: