Nine days ago when the Lightning rallied to defeat the Penguins 5-4 at AMALIE Arena, the Bolts got into a track meet with the Pens, the two teams going up and down the ice and creating multiple scoring chances both ways.
Sergachev scored his third goal in the past two games at 10:32 of the third period while on the power play.
As the first team to reach 15 points, Tampa Bay remains the top team in the National Hockey League standings.
Yanni Gourde and Brayden Point each had a goal and an assist for Tampa Bay. Tampa Bay RW Nikita Kucherov and C Steven Stamkos each extended their season-long scoring streak to nine games. The Lightning are the first team to beat Bobrovsky this season.
Still, the Pens have superstars Sidney Crosby, Evgeni Malkin and Phil Kessel and a host of other really good players on their roster, and the Lightning just defeated them by six goals, tied for the third-largest margin of victory all-time in Bolts history.
Antti Niemi's first three starts in a Penguins uniform have come under some of the most adverse conditions a goaltender can face. It was the second time Niemi started against the Lightning this season and the second time he allowed at least five goals.
Stamkos made it 2-0 later in the period when, with the Lightning again on the power play, he converted a pass from Vladislav Namestnikov for his third goal of the season.
On the Bolts' second power play, a lovely passing sequence between Kucherov, Vladislav Namestnikov and Stamkos produced the second goal of the night. The Jackets are averaging 3.50 goals per game while allowing 2.17 per contest.
Kucherov scored his first of the night 1:36 in to the game on the power play while Stamkos made it 2-0 at 14:16 of the first period. It was Gourde's first goal of the year.
With 20.4 seconds to go, goalie Andrei Vasilevskiy went post to post to get his left arm on a Carl Hagelin shot that seemed destined for the back of the cage.
Point turned it into a route when he scored 30 seconds in to the second period.
Jake Guentzel broke up the shutout bid with a power-play goal with 1:42 left.