OTTAWA -- The Ottawa Senators, playing without three of their top six forwards, hung on to defeat the Philadelphia Flyers 5-4 at Canadian Tire Centre on Thursday.
Dion Phaneuf, Mark Borowiecki, Jean-Gabriel Pageau, Mark Stone and Tom Pyatt scored for the Senators (5-1-4). Craig Anderson made 36 saves.
Ottawa, which was missing forwards Kyle Turris (illness), Bobby Ryan (broken finger) and Zack Smith (upper-body injury), scored three goals in the opening 13:28.
[WATCH: All Flyers vs. Senators highlights]
Jakub Voracek, Travis Konecny, Ivan Provorov and Sean Couturier scored for the Flyers (5-5-0). Michal Neuvirth made 23 saves.
Provorov and Couturier scored in the final 4:42 of the third period to make it a one-goal game. Provorov cut the Senators lead to 5-3, and Couturier made it 5-4 with 1:46 remaining with his seventh of the season.
Video: PHI@OTT: Couturier tips home Gostisbehere's shot
The Senators have blown a third-period lead three times this season, losing twice in a shootout and once in overtime. It appeared Couturier may have tied the game with 56 seconds left in the third. The Situation Room initiated a review to determine if his shot crossed the goal line, but the play was not reviewable because referee Steve Kozari was in the process of blowing his whistle after losing sight of the puck.
"We made it definitely interesting for our fans, made sure they don't leave their seats too early," Anderson said. "We just found a way. We don't want to make this a habit. We want to make sure we continue to play hard all the way to the end and not give the other team a sniff. We're learning. That's the nice thing. It's early in the year and we got learning to do and we're doing that right now."
Pageau scored his first goal of the season and the 10th shorthanded goal of his NHL career at 13:28 of the first period to give the Senators a 3-0 lead. Phaneuf (1:31) and Borowiecki (9:50) scored earlier in the period.
"We were just sloppy," Voracek said. "There's no way around it. A bad start. They score right away. Second goal was a blown coverage by me. I think we played better since the second period, but sometimes it's not good enough."
Voracek and Konecny scored 53 seconds apart in the second period to get the Flyers back in the game. Voracek's pass from behind the goal line deflected in off Phaneuf at 14:30 for his first goal of the season, and Konecny scored on a shot over Anderson's right pad at 15:23 to make it 3-2.
Video: PHI@OTT: Stone scores on spinning backhand
Stone put the Senators ahead 4-2 at 17:37 of the second when he took a pass in the slot from Ryan Dzingel and spun a backhand past Neuvirth.
Pyatt scored to make it 5-2 at 10:33 of the third period, 55 seconds after a goal by Philadelphia's Brandon Manning was disallowed following a challenge by Ottawa coach Guy Boucher because of goaltender interference by forward Jordan Weal.
Flyers forward Nolan Patrick, the No. 2 pick in the 2017 NHL Draft, was scratched. He is day to day with an upper-body injury following a hit by Anaheim Ducks forward Chris Wagner in a 6-2 loss Tuesday.
Goal of the game
Pyatt used Nate Thompson as a decoy on a 2-on-1 and beat Neuvirth with a low shot to the stick side from the right face-off dot.
Video: PHI@OTT: Pyatt pots wrister on two-on-one rush
Save of the game
With the Flyers pressing for the tying goal, Anderson got his right toe on a shot by Valtteri Filppula from the low slot with 1:18 left in the third.
Highlight of the game
With the Senators shorthanded, Karlsson stepped up to intercept Konecny's pass at the Ottawa blue line, carried the puck through the neutral zone and set up Pageau for his goal.
Video: PHI@OTT: Pageau beats Neuvirth for shorthanded goal
They said it
"We made a couple of plays that were a little bit jittery under some pressure, not under heavy pressure. At times, that's going to happen on the road with the group that we have back there. That being said, they made a couple mistakes, but they reeled it in and we got going and got skating together." -- Flyers coach Dave Hakstol
"Sometimes adversity at the beginning of the year is a good thing. If you're able to battle through that adversity early on, I think it can make you tighter going through the home stretch." -- Senators defenseman Mark Borowiecki on their injuries
Need to know
Senators forwards Filip Chlapik and Christopher DiDomenico each got his first point in the NHL with an assist on Phaneuf's goal. … Turris will not play at the New Jersey Devils on Friday, but Smith could return after missing three games.
Flyers: At the Toronto Maple Leafs on Saturday (7 p.m. ET; CBC, NBCSP+, NHL.TV)
Senators: At the New Jersey Devils on Friday (7 p.m. ET; MSG+, RDS2, TSN5, NHL.TV)