Steven Stamkos appeared to give the Lightning a 3-1 lead at 6:02 of the third period, but the Bruins successfully challenged the play for offside.
However, Kucherov scored an empty-net goal at 19:33 for the 3-1 final. Kucherov leads the NHL with 124 points (42 goals, 82 assists), one more than Nathan MacKinnon of the Colorado Avalanche.
"I'm not going to take anything away from what we did. I thought we played strong from the drop of the puck right to the end," Lightning coach Jon Cooper said. "Boston had a really hard-fought game last night, found a way to dig in, come back and get that win. The message to the guys was, there are times you should catch a team that might be a little tired. Getting the lead was big for us tonight. But I thought ... take advantage of a team that emptied the tank the night before and we did."
NOTES: Kucherov's 42 goals are an NHL career high. He scored 41 in 2018-19. ... Point has scored 10 goals in his past seven games. ... Lightning defenseman Victor Hedman had an assist and has 70 points (12 goals, 58 assists) this season, the third time he has reached the mark. He joined Erik Karlsson of the Pittsburgh Penguins (five), Brent Burns of the Carolina Hurricanes (three) and John Carlson of the Washington Capitals (three) as the only active defensemen with at least three 70-point seasons. ... Point and Hedman each returned after missing the Lightning’s 3-2 overtime win against the Anaheim Ducks on Sunday because of a lower-body injury. … Bruins forward Brad Marchand had two shots on goal but has not scored in his past eight games. He is one shy of 400 in the NHL. ... Boston is 4-3-4 in the second half of a back-to-back.