The center, though, would only admit that he knew he was going to play as of Saturday morning.
"I woke up, felt a little better again," he said. "I felt like I can help the team, and it ended up working pretty well for us."
That might be a bit of an understatement.
Or, as Kuznetsov later said of playing through the injury, "It's emotional stuff. Like Michael Jordan, when he played his best game. He got hurt, got 53 points."
It was not immediately clear which game he was referring to. It could have been when Jordan scored 63 points for the Chicago Bulls in Game 2 of the first round of the 1986 NBA playoffs against the Boston Celtics after returning from a broken left foot and being expected to miss the rest of the season. Or the "Flu Game," when Jordan scored 38 points in Game 5 of the 1997 NBA Finals against the Utah Jazz.
"When you're hurt, you play a little better always," Kuznetsov said. "You have extra energy. Sometimes it's even better for you when you watch the hockey from upstairs a little bit and you see a few things a little bit. It's just so emotional."
Kuznetsov left Game 2 at Vegas on Wednesday with 5:18 remaining in the first period after a hit by Golden Knights defenseman Brayden McNabb. It was not entirely clear until he came out for warmups before Game 3 that he was going to play.
And right at the beginning, he was making an impact. Kuznetsov took the puck down the ice on a 2-on-1 with Ovechkin, with McNabb between them and goaltender Marc-Andre Fleury, and slid a pass across the slot to Ovechkin, but Fleury made the save 1:08 into the game.
He didn't later, at 12:50 of the second period, after T.J. Oshie started a play in the defensive zone, knocking the puck over to forward Jay Beagle, who tapped it to Kuznetsov coming down the right side. Just as Kuznetsov sailed through the face-off dot, he flicked the puck at Fleury, scoring his 12th goal of the Stanley Cup Playoffs and the one that, after a Tomas Nosek goal for Vegas at 3:29 of the third period, stood as the winner.
"I think the shot, it's not my strong side," Kuznetsov said. "But that situation, we got a 2-on-1, I looked for [Beagle] and when you have a chance to feed those guys who play on the PK a lot, who block a lot of shots, you want to make that pass for him. But he wasn't open that time and I have to shoot."