"We always want to score, but I think the most important thing is not to get scored on, and we did a good job at that too," Forsling said.
Gustafsson scored on the power play 1:54 later to make it 2-1. After taking a pass from Patrick Kane, his shot from the blue line deflected off Predators defenseman Ryan Ellis' left arm and into the net at 17:16.
"I think [Kane] took it down on the wall," Gustafson said. "Just trying to be open on the blue line. Just trying to take it as quick as I can to the middle. Saw the lane, shot it, and saw it go in."
Blackhawks forward Marcus Kruger left the game at 16:31 of the second period after he skated into Predators forward Ryan Hartman's elbow. Chicago coach Jeremy Colliton said Kruger has a concussion and will not travel for games at the Dallas Stars on Thursday and at the Colorado Avalanche on Friday.
"I knew someone was coming," Hartman said of the play. "I had the puck and, you know, I was skating backwards trying to brace for a hit, I launched [the puck]. It's a tough play.
"I hope he's all right. It didn't look good, but I asked a couple of guys if he was all right, I guess he just had a few stitches. But I hope there's nothing too serious. I was just trying to brace for impact, it was unfortunate that it resulted in that."
Predators forward Colton Sissons was helped to the locker room at 14:16 of the third period after catching his skate against the boards and rolling his right ankle.