Tage Thompson also scored for the Sabres (15-21-5), who had lost three straight following a three-game winning streak. Luukkonen made 25 saves.
“I think the work ethic that our group has shown in the past two or three weeks has been a lot better,” Tuch said. “I think the commitment to playing the right way, to better D-zone, to blocking shots, to sacrificing for one another, I think has been a lot better. It hasn’t been perfect by any means. It needs to be better, continue to get better. We’ll use this as a steppingstone.”
Tom Wilson scored twice to extend his goal streak to three games, and Charlie Lindgren made 24 saves for the Capitals (26-10-4), who extended their point streak to four games (2-0-2).
“The resiliency to battle back when we weren't very good at all, to not fold the tent and to fight back in that game, to get it to overtime is a positive that we'll draw from,” Washington coach Spencer Carbery said.
Tuch gave Buffalo a 1-0 lead at 4:42 of the first period, deflecting Peterka’s wrist shot from the right face-off circle on the rush.
Wilson tied it 1-1 on the power play at 6:10 with a one-timer from the high slot off a pass from Jakob Chychrun.
With the teams playing 4-on-4, Tuch gave the Sabres a 2-1 lead at 1:07 of the second period after stealing the puck from Chychrun at the left point in the Buffalo end and breaking in to beat Lindgren glove side.
“I think tonight I was a little bit more direct,” Tuch said. “I was causing some turnovers, I was on top of their guys, not giving them any breathing room and that’s when I’m at my best.
“In the past I think I’ve been maybe too focused on one thing or another and not just focused on going out and playing and feeling and playing the game that I know I can play.”