BUFFALO -- The Ottawa Senators scored five goals in the first period of a 6-2 win against the Buffalo Sabres at KeyBank Center on Wednesday.

“I thought that we were ready to go,” Ottawa coach Jacques Martin said. “We got some pucks at the net, we got people at the net. Took advantage of our opportunities and, I think, built a nice lead. And then I thought, in the third period, we continued again. Our goaltending was good. Made some key saves. But I thought we shut them down in the third period good.”

Shane Pinto had a goal and three assists, and Brady Tkachuk, Boris Katchouk, Jakob Chychrun and Drake Batherson each had a goal and an assist for the Senators (31-36-4), who have won three in a row. Korpisalo made 34 saves.

“If you want to win, you need balance,” Pinto said. “And we had that tonight and it's going to be big for the back-to-back tomorrow (against the Chicago Blackhawks) to have that same thing. So, going to need all the guys on board.”

JJ Peterka and Connor Clifton scored for the Sabres (34-34-5), who have lost four of six. Ukko-Pekka Luukkonen allowed four goals on nine shots before he was replaced by Devon Levi, who made 31 saves in relief.

“We wanted, I guess, to play as individuals,” Clifton said. “I’m disappointed we let ‘Upie’ down, he’s the heart and soul of this team. He’s kept us in so many games, and just to not show up and play that careless style, give them freebies all over the place. … Yeah, obviously, the first 20 really dictated the rest of the game.”

Artem Zub gave Ottawa a 1-0 lead at 2:37 of the first period. He stuffed in a loose puck on the goal line after Katchouk’s shot was redirected by Mark Kastelic between Luukkonen’s pads.

Katchouk made it 2-0 at 4:56, tipping Parker Kelly’s shot from the top of the right face-off circle past Luukkonen.

“It's keeping the consistency with good effort, right habits,” Katchouk said. “The small things matter so much in this game. And obviously, it worked out tonight with the tip. But kudos to my linemates. ‘Kels’ and ‘Kassy,’ they worked hard to get the puck as well. Those two battle hard every night as well. We feed off each other, and it's good to play with them.”

OTT@BUF: Batherson gets the puck in front and puts home a backhand

Batherson pushed it to 3-0 at 6:01 when he picked up a loose puck in front, shifted it from his forehand to backhand and scored around Luukkonen’s outstretched pad.

Chychrun extended the lead to 4-0 at 8:49 with a slap shot from the top of the left circle, chasing Luukkonen.

“That was probably the worst part,” Sabres defenseman Rasmus Dahlin said. “We let [Luukkonen] down. He’s been saving us for a long time now. That’s not OK from our side.”

Tkachuk made it 5-0 at 19:11, finishing a touch pass from Thomas Chabot at the left post with the teams playing 4-on-4.

“I was pretty shocked,” Clifton said. “I thought, our season’s on the line, we’ve got a team we played three other times already, right, to finish the season series. They came in and they gave it to us, and we had no answer. Obviously, you give up five, that was that.”

Peterka cut it to 5-1 at 2:54 of the second period with a wrist shot after Alex Tuch’s shot rebounded to him in the slot.

Clifton made it 5-2 at 13:07 when he carried the puck into the offensive zone and beat Korpisalo with a wrist shot from the slot.

Pinto scored an empty-net goal at 16:43 of the third period for the 6-2 final.

“You’re frustrated,” Sabres coach Don Granato said. “You’re disappointed. Just the simple, simple things that would be routine execution were not. Obviously, that’s frustrating.”

NOTES: The Senators scored five goals in the first period for the first time since Jan. 8, 2004. … Ottawa’s four goals in an 8:49 span were the fastest four by any team this season. … Chabot left the game at 3:31 of the third period with an undisclosed injury. Martin said the defenseman would be evaluated. … Tuch extended his assist streak to six games (seven assists), the longest such streak of his NHL career. … Peterka has four goals during a three-game goal streak. … Sabres forward Jack Quinn played 15:41 and had one shot on goal in his return after missing 23 games with a lower-body injury.