Stutzle made it 3-0 when he deflected a shot from the slot past Daws at 11:10 of the third period. Thomas Chabot took the initial shot from the point.

“We’re working really hard together, playing for each other, and you can see the vibe in the room,” Stutzle said. “It’s not too high or not too low. We just keep building every game, get better every day, and go from there.”

The Devils appeared to pull within 3-1 at 11:58 of the third when Jesper Boqvist scored, but the Senators successfully challenged the play for goaltender interference.

Gritsyuk did cut the deficit to 3-1 at 14:59 with a wrist shot between the circles.

“We’re getting free ice on the outside and I think at times settle for the play on the outside,” New Jersey forward Jesper Bratt said. “They protect the middle pretty well and we didn’t funnel enough pucks into those areas with guys there. A lot of times we were shooting from the outside and didn’t have enough guys (on the inside).”

Said Keefe: “We got to learn how to score when it’s hard and that’s the reality of it, so we got to stay with it.”

Kleven scored an empty-net goal at 17:53 for the 4-1 final.

“It’s a pretty focused group, pretty determined group, and we’ve never been a team to talk about injuries or let it deter what we’re all about,” Ottawa coach Travis Green said. “Give the guys credit, they’ve played well to find a way to get off to a pretty good start.”

NOTES: Ottawa defenseman Nikolas Matinpalo will be reevaluated on Tuesday after he sustained an upper-body injury after being hit head-first into the boards by Devils forward Anthony Mantha, who was assessed a five-minute major for boarding on the play. … Green said that defensemen Jake Sanderson (undisclosed injury) and Artem Zub (knee) are close to returning to the lineup but not expected to make their season debut against the St. Louis Blues on Tuesday. … Ullmark (5-0-0) is the third goaltender in Senators history to win his first five or more games of a season, joining Ray Emery (six games in 2005-06) and Dominik Hasek (five games in 2005-06). … Stutzle has a point in each of his first four road games to start the season. Only one German player has recorded a longer such point streak: Leon Draisaitl (twice: eight games in 2022-23 and six games in 2020-21). … Devils forward Jack Hughes extended his point streak to three games (four assists). … New Jersey placed forward Connor Brown on injured reserve retroactive to Sept. 28 earlier in the day.