That's because they've done it before.
The Blues trail the best-of-7 series 1-0 and view their 4-2 loss Monday as a wakeup call, but they are not discouraged. After losing Game 1 of the Western Conference Final 6-3 to the San Jose Sharks, St. Louis responded with a compete effort in a 4-2 victory in Game 2 and won the series in six games.
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"We know what our best game looks like and we're confident we can win," Blues center Ryan O'Reilly said Tuesday. "We know the first one wasn't what we wanted, and we're going to respond and tie the series up. That's our plan and we're just going to keep taking it one at a time."
The Blues have a lot to improve on from Game 1 after letting a 2-0 lead slip away, beginning with generating more scoring chances against Bruins goalie Tuukka Rask. They were outshot 38-20, including 18-3 in the momentum-changing second period and 30-12 over the final two periods.
During one stretch that bridged the end of the second period and start of the third, St. Louis went 12:49 without a shot on goal. That's not going to cut it against Rask, who leads the Stanley Cup Playoffs with a 1.85 goals-against average and .940 save percentage.
During Boston's eight-game winning streak, Rask has stopped 238 of 249 shots for a 1.38 GAA and .956 save percentage.
"We have to get more shots, but create some traffic," said Blues forward Vladimir Tarasenko, whose goal 1:00 into the second period gave St. Louis a 2-0 lead. "He's a good goalie and we need to create some second chances and make his life uncomfortable to go in the hard areas, create some traffic. Obviously, the number of shots we got last game is not enough."