It will be no easy task for the Bruins on Wednesday night with the Eastern Conference-leading Lightning coming to town. Tampa is on top of the Atlantic Division with 34 points and is pacing the National Hockey League in scoring with an average of 3.7 goals per game.
Forwards Steven Stamkos (36 points) and Nikita Kucherov (34) are first and second in the league in scoring, with Kucherov also ranking second in goals (17), one behind Alex Ovechkin.
"Denying them the puck early on was the [Connor] McDavid theory the other day," said Cassidy. "I thought that worked out OK vs. Pittsburgh as well. These guys are a little different. They're a little more tic-tac-toe in the offensive zone, less through the neutral zone, high-end speed.
"They find those seams, so we have to have active sticks and scope out and find them."
Tampa Bay has, however, dropped its last two games and three of its last four.
"I don't think there's any easy games in this league, personally. I haven't witnessed that yet - haven't been around that long," added Cassidy. "Having said that, the last few games haven't gone their way either, so maybe we're catching them at the right time. But at the end of the day we're expecting a real good team to come in here tomorrow and we have to have our A-game."