Nashville left wing Kevin Fiala was taken off the ice on a stretcher 1:46 into the second period after his left leg hit the end boards when he was checked to the ice by St. Louis defenseman Robert Bortuzzo. The game was delayed 17 minutes by the injury and to wait for an ambulance to arrive and replace the one that took Fiala to the hospital.
Nashville coach Peter Laviolette did not provide an update on the 20-year-old after the game. The Predators said earlier Fiala was alert and stable.
"I don't think anybody could've thought or planned an incident like that with Kevin, and yet our guys, you could hear them on the bench when it happened, making sure their next shift was going to be a good one for Kevin," Laviolette said. "It was just one of those unfortunate incidents that happened in a game."
Colton Parayko had a goal and assist, and Jaden Schwartz and Vladimir Sobotka tied the game with third-period goals for St. Louis. Allen made 28 saves.
Game 2 of the best-of-7 series is here Friday.
Subban gave Nashville a 2-0 lead at 2:22 of the second period, 36 seconds after play resumed, and after Parayko made it 2-1 at 8:04, Forsberg scored a power-play goal for a 3-1 lead at 12:11.
"I liked the pushback," Blues coach Mike Yeo said. "I liked the fact we came out the way that we did. Certainly some things we can learn from that, but the reality is, the second period was not good enough. Ultimately it cost us the game."
Schwartz made it 3-2 at 6:48 of the third period, and Sobotka tied it 3-3 at 9:22, but Fiddler put Nashville back in front 4-3.
Wilson tipped in a power-play shot by Subban at 11:24 of the first period to give the Predators a 1-0 lead.