Radulov, Stars defeat Avalanche in Game 1 of Western Second Round

Alexander Radulov had two goals and an assist, and the Dallas Stars defeated the Colorado Avalanche 5-3 in Game 1 of the Western Conference Second Round at Rogers Place in Edmonton on Saturday.

Jamie Benn had three assists, Tyler Seguin had a goal and an assist, and Anton Khudobin made 28 saves for Dallas, the No. 3 seed in the West.

"After the Calgary [Flames] start (Dallas trailed 3-0 at 6:34 of the first period in Game 6 of the first round on Thursday before winning 7-3), we wanted to have a good start," Benn said. "We know these guys are an elite hockey team. A lot of skill, some high-end players, and we wanted to roll four lines early and get everyone in it. I thought we did that well tonight."

WATCH: [All Stars vs. Avalanche highlights]

Nathan MacKinnon had two goals and an assist, and Gabriel Landeskog had a goal and an assist for Colorado, the No. 2 seed in the West.

Philipp Grubauer allowed three goals on 10 shots before leaving 3:06 into the second period with an apparent left leg injury. He was replaced by Pavel Francouz, who made 18 saves.

"Obviously, he's in a position there where he tweaked something and (was) unable to continue, that's already bad news," Avalanche coach Jared Bednar said of Grubauer. "You know, time will tell how long he's going to be out. I have no idea at this point, but I'm not expecting him to hit the ice tomorrow or anything like that. … In the meantime, [Francouz is] going to have to get the job done."

The team that wins Game 1 is 485-220 (68.7 percent) winning a best-of-7 Stanley Cup Playoff series, including 7-1 in the first round.

Game 2 is in Edmonton, the West hub city, on Monday (9:45 p.m. ET; NBCSN, SN, TVAS).

Seguin gave the Stars a 1-0 lead with his first goal of the playoffs at 4:00 of the first period after receiving a pass from Benn, who was behind the net.

"It felt good," Seguin said. "That was all my linemates. Pretty patented goal where they're battling in the corners and I kind of tried to find that soft area and happy it went in."

MacKinnon scored 64 seconds later on a snap shot from the slot to tie it 1-1.

"They seemed more competitive than us. Just an off night for us, I guess," MacKinnon said. "It's going to be a tough series, and they have to beat us three more times, and we'll be well-prepared for Game 2."

Blake Comeau scored with a shot that deflected off the stick of Avalanche defenseman Ryan Graves to give Dallas a 2-1 lead at 9:51.

Radulov took a centering pass from Benn and beat Grubauer five-hole with a backhand to push the lead to 3-1 at 16:28. Radulov, Benn and Seguin combined for eight points (three goals, five assists).

"Any time our (top) line scores a goal early in the game, you know they're going," Stars coach Rick Bowness said. "When that line scores an early goal like that, that's huge and you just have to let them go. We're not going anywhere without our top players. Their top players performed tonight, and so did ours."

Landeskog got the Avalanche within 3-2 at 4:36 of the second when he skated around Khudobin and stuffed the puck inside the right post. Radulov's second of the game made it 4-2 at 9:09.

"They came out hard, no doubt," Landeskog said. "Toward the end of that Calgary series, it looked like they kind of came into their own and started playing better than what they showed in round-robin. But that's the case any time at this point of the season: The further you go, the better the teams are going to get. You have to bring your best every night, and we sure didn't tonight."

MacKinnon scored on a redirection at 18:29 of the second to make it 4-3. He leads the postseason with 16 points (six goals, 10 assists).

"Give them credit," Comeau said. "They're a really good hockey team and they pushed hard. They had some good looks, but I thought we did a good job of not bending too far."

Roope Hintz scored his first goal of the postseason, glove side from the right circle, at 8:47 of the third for the 5-3 final.

"Obviously, Dallas is a good team; they wouldn't be here if they weren't a good team," Landeskog said. "But a lot of what happened tonight was self-inflicted as well. We just didn't get up to the standard we need to play at at this point of the season. We need to be a lot better, no doubt."

NOTES:Avalanche defenseman Erik Johnson left the game midway through the first period, returned and took eight shifts the second but did not play in the third. Bednar said he tweaked something but chose to remain on the bench to support his teammates. … Avalanche forward Matt Calvert (unfit) missed his first game of the playoffs. … MacKinnon has at least one point in all nine postseason games. … Miro Heiskanen had an assist for the Stars and leads defensemen with 13 points (three goals, 10 assists).

NHL.com staff writer Tracey Myers contributed to this report