The Caps took a few minutes to find their legs at the start, and Montreal took advantage of it to grab an early 1-0 lead. Washington got caught with too many guys on the wrong side of the puck in the offensive zone, and Kotkaniemi broke the puck out of the Montreal end, starting a three-on-two rush. After taking a feed from Armia, Kotkaniemi netted the first goal of his NHL career, snapping a shot behind Holtby at 2:28 of the first.
Washington answered a few minutes later when Lars Eller scored against his former Montreal teammates, putting back a rebound of a Matt Niskanen shot to make it a 1-1 game at 6:16 of the first.
Montreal regained its lead in the first minute of the second when Brendan Gallagher converted a Tomas Tatar feed just 32 seconds into the middle frame. On their very next shift, Tatar set up Gallagher again, this time the latter pulling the puck off the back wall and stuffing it behind Holtby on the short side for a 3-1 Montreal lead at 3:06 of the second.
For the third time in as many shifts, Gallagher's line was on for a lamplighter, but the third one was a Washington goal. Montreal turned the puck over in neutral ice, and all five Caps on the ice had possession of the puck at some point in a span of six or seven seconds, culminating with Alex Ovechkin finishing an Evgeny Kuznetsov backhand feed to make it a 3-2 game at 6:49.
Seventy seconds later, Brett Connolly won a board battle behind the Montreal net and managed to roll the puck to the front for Eller, who cranked a one-timer from the slot behind Habs goalie Carey Price to square the score at 3-3.
Less than five minutes later, the Caps took their first lead of the evening on Ovechkin's second goal of the game. On a sustained offensive zone shift, Niskanen lunged to push the puck from the slot to partner Dmitry Orlov up high in the zone. Orlov floated it back toward the net, and it caught Ovechkin about shoulder high and bounded into the cage, putting the Caps up 4-3 at 12:53 of the second.
The Caps managed to expertly kill off a Montreal power play at the start of the third, getting good pressure up ice and some scoring chances of their own in the process. Montreal started to turn up the heat around the middle of the third, and it took a great Holtby save on Domi with about 12 minutes left to preserve the 4-3 lead, albeit temporarily.