Nikita Zadorov scored into an empty net to push it to 3-0 at 14:52 before Koepke’s second goal made it a 4-0 final at 15:53. He scored with a one-timer from the right face-off circle off a David Pastrnak pass on a 2-on-1.
"They just played harder than us, they outworked us," Tampa Bay forward Brandon Hagel said. "I don't think that's anywhere near Tampa Bay Lightning hockey and everyone knows it. Tonight it just wasn't us. When you're not at your best or not even close to your best it's an easy page to turn and a lesson to learn."
Casey Mittelstadt got the secondary assist on the final goal in his Boston debut. The center was acquired from Colorado in the trade for Coyle.
"That guy is a phenomenal player, he's got loads of skill," Koepke said of Mittelstadt. "When the puck’s on his stick it's in a good spot. He's always making really good plays and he sees the ice very well. He has an unbelievable skill set. I just tried to get him the puck as much as I could tonight and get open and let him do his thing."
NOTES: Tampa Bay defenseman Victor Hedman was a late scratch and is day to day with a lower-body injury. ... The Lightning had won their previous seven home games. They hadn’t been shut out at home since Nov. 11, 2023, in a 4-0 loss to the Carolina Hurricanes. ... It was Koepke’s first multigoal game in the NHL (82 games). ... Bruins defenseman Henri Jokiharju, acquired in a trade with the Sabres on Friday, was plus-1 with seven shot attempts (one on goal) in 18:38 of ice time in his Boston debut.