BLOOMINGTON, Ind. — Cody Zeller and teammates were not themselves Monday night.

The 7-foot center had an excuse — he was sick. Teammates looked as if they caught the same bug.

Fortunately, the Hoosiers found a remedy at halftime.

Zeller, Remy Abell and Jeremy Hollowell turned the game with a second-half run that finally allowed No. 1 Indiana to pull away to an 87-61 victory over pesky North Dakota State in the first round of the Progressive Legends Classic.

"Your fundamentals, your technique, all your experiences, all those things are really, really important, but there's nothing bigger than energy and toughness. It's got to be there constantly," Indiana coach Tom Crean said. "Once we got that figured out tonight — and we had some guys that figured it out from the beginning, but we didn't have a team of guys that figured it out from the beginning — I thought we played pretty well."

This was the kind of game that had given Indiana problems in previous seasons. Fans, and perhaps Indiana's players, figured those struggles were over since the Hoosiers (2-0) reclaimed their spot on top of the college-basketball world.

But North Dakota State proved how dangerous assumptions can be.

The Bison (1-1) challenged virtually every shot Indiana took.

When the Hoosiers couldn't get their up-tempo, inside-out game in sync, the offense sank. The grind-it-out style made them look ordinary.

"There's conventional, there's unconventional and then there's tonight," Crean said.

Zeller finished with 22 points.

Michigan romps

ANN ARBOR, Mich. — For a second consecutive game, No. 5 Michigan breezed to an easy victory behind torrid outside shooting.

Trey Burke scored 22 points and Glenn Robinson III added 21, leading the Wolverines to a 91-54 victory over Indiana University-Purdue University-Indianapolis.

Oregon prevails

EUGENE, Ore. — Freshman point guard Dominic Artis scored 16 points to lead Oregon over Portland State 80-69.

Carlos Emory added 15 points and Damyean Dotson had 12 points for the Pac-12 Ducks (2-0), who made 8 of their first 11 three-point attempts.

Dre Winston Jr., who is from Lakewood and transferred from Washington State, and Renado Parker, a graduate of Kentridge High School in Kent, each had 15 points to lead Portland State (1-1).

Winston made 6 of 8 shots from the field and Parker was 5 for 10.

Stanford improves to 2-0

STANFORD, Calif. — Chasson Randle scored 24 points, Aaron Bright of Bellevue added 16 and Pac-12 Stanford beat Cal State Fullerton 81-68 in its home opener.

Dwight Powell had 14 points and 12 rebounds for the Cardinal (2-0), which opened the season with a victory over San Francisco on Friday.

D.J. Seeley and Sammy Yeager scored 16 points each for the Titans, who tipped off their season with assistant coach Julius Hicks at the helm in place of interim coach Andy Newman. Newman is serving a two-game suspension for secondary NCAA rules violations.