BUFFALO, N.Y.  — Coach Scott Sandelin isn’t taking Minnesota Duluth’s third consecutive trip to the Frozen Four championship game for granted because of how difficult it is to get there.

It wasn’t easy for the Bulldogs once again in pulling out a 4-1 victory over Providence in a tightly contested game they sealed by scoring two empty-net goals in the final 33 seconds Thursday night.

Minnesota Duluth (28-11-2) overcame having two goals disallowed in the first period and then killed off the Friars’ two-man-advantage in the third period, some three minutes before Billy Exell scored the go-ahead goal with 9:53 left.

“I was nervous as hell when they got the 5-on-3, the way their power play was,” Sandelin said. “To be able to do that at that time of the game was a big-time moment. Those are changing, turning points in games. Whether we went on to win that, I was just thrilled to get out of their still tied.”

Justin Richards scored twice, including an empty-netter, and Dylan Samberg also scored for Minnesota Duluth. The Bulldogs are attempting to become the first team to win consecutive titles since Denver in 2004-05.

Hunter Shepard stopped 28 shots and improved his NCAA Tournament career record to 7-0.

The National Collegiate Hockey Conference champion Bulldogs also became the first team to reach three consecutive championship games since Boston College from 2006-08. Minnesota Duluth lost 3-2 to Denver in the 2017 championship game.

The Bulldogs could face Denver yet again in the championship game Saturday. The Pioneers played Massachusetts in the other semifinal.

Providence (24-12-6) was denied an opportunity to reach its first championship game since 2015, when the Friars beat Boston University 4-3 to win their first title. Josh Wilkins scored for Providence and Hayden Hawkey stopped 32 shots.

Sandelin credited the Bulldogs for leaning on their past experience playing on a big stage.

“Our group has been in a lot of tough games, they’ve been in big games. And they’ve learned how to win some of those games,” said Sandelin, who became the ninth coach to reach the championship game four times. “It’s never easy. It doesn’t always happen right away. This group, sometimes I didn’t know if it was there. But they’ve really proven it here when it’s crunch time.”

Exell’s goal was just the senior’s third of the season.

Kobe Roth set up the goal by firing a shot from inside the blue line. Hawkey got his blocker up to stop it, but couldn’t control the rebound. Exell was already driving to the net when he chipped a bouncing puck over Hawkey’s out-stretched glove.