Thatcher Demko made 22 saves in his first start since March 24 for the Canucks (18-19-3), who lost for the first time in three games since coming back Sunday from an 18-day pause due to a COVID-19 outbreak.
"I struggled with it. It's tough on the body. The biggest thing for me were just the fatigue, the body aches and some of the brain fog stuff," Demko said. "I don't know if anyone's really at 100 percent. I know COVID took a toll on us. Obviously it's tough to take that much time off, but we've got a job to do to come in and win some games here. That's what everyone's geared towards and ready to do."
Vancouver is sixth in the seven-team Scotia North Division, 10 points behind the fourth-place Montreal Canadiens with four games in hand. Ottawa is one point behind Vancouver but has played seven more games. The top four teams will qualify for the Stanley Cup Playoffs.
The teams play again here Saturday, and at Ottawa on Monday and Wednesday. The Canucks won their first five games against the Senators this season, outscoring them 21-7, but fell behind on two power-play goals Thursday.
"It was a different game than last time we played them," Vancouver defenseman Nate Schmidt said. "They got a couple chances and that was the difference. Thatcher played really well and we need to give him some support, especially after we gave up those two and he shut the door the rest of the way."
Tim Stutzle deflected a Nicholas Paul shot while cutting through the slot to make it 1-0 at 9:17 of the first period.
It was the sixth straight game the Senators scored on the power play, and their seven power-play goals in that stretch is more than they scored in the previous 18 games.
"We worked on that, we talked a lot on and off the ice to get better," Stützle said. "I mean, in the beginning we were definitely struggling, and if you have a good power play I think it always helps a lot."