Ottawa responded just 37 seconds, though, as right-winger Francis Perron managed to beat Canadiens starter Michael McNiven to tie things up 1-1 through 20 minutes of play.
With Sergachev in the penalty box early in the second period, centerman Nick Paul scored to give the Senators a 2-1 lead. But, just 17 seconds after Paul found the back of the net, Sergachev connected with Audette again to tie things up 2-2 at the 3:04 mark of the frame. Nikita Scherbak was credited with the secondary assist on the power play tally.
Sergachev found himself in the penalty box again when centerman Filip Chlapik put the Senators ahead 3-2 at the 6:26 mark of the period.
Perron's second goal of the game at 15:26 gave the Senators a 4-2 advantage, before Matthew Bradley scored for the Canadiens at 17:52 to cut Ottawa's lead to just a single goal. Jeremiah Addison collected the lone assist on the play.
Unfortunately, Sergachev was forced to leave the game at one point during the period and did not return to the game after taking a hit from Senators left-winger Vincent Dunn. The Canadiens announced that Sergachev had sustained an upper-body injury.