Giroux made it 2-0 at 12:15 with a redirect that went between the legs of Golden Knights defenseman Brayden McNabb and then through Hill’s five-hole.

Nicolas Roy cut the score to 2-1 at 5:23, and Nicolas Haag tied it 2-2 21 seconds later when he threw the puck at the net and sent it off the skate of Senators defenseman at 5:44 Jake Sanderson entered.

Batherson then put Ottawa back ahead 3-2 at 6:34 with a shot from the high slot, but Barbashev made it 3-3 at 6:40 of the second period by tipping in a shot from Pietrangelo.

Gaudette’s second goal of the game gave the Senators a 4-3 lead on the power play at 17:44. He scored with a wrist shot to the glove side from the top of the slot.

“It was a wake-up call for us. We didn’t play our best today,” Barbashev said. “We let them run for about 50 minutes of the game. We all know we have to be better.”

NOTES: Giroux has seven points (three goals, four assists) in a five-game stretch. … Senators forward Brady Tkachuk had his season-opening six-game, three-game goal streak. … Reinhardt played his second NHL game and first since April 7, 2022. … Ottawa forward Michael Amadio was minus-2 in 14:22 of ice time in his first game against Vegas since signing a three-year, $7.8 million contract ($ 2,6) signed. million average annual value) at the Senators on July 1. He spent the past three seasons with the Golden Knights. … Pietrangelo had three assists for the second straight game after beating the Los Angeles Kings 6-1 on Tuesday.