NCAA Division I tournament

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Regionals

Regional seeding listed with each team

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Sioux Falls, S.D. regional

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Thursday’s games

No. 1 Boston University 6, No. 4 RIT 3

No. 2 Minnesota 3, No. 3 Nebraska-Omaha 2

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Saturday’s game

No. 1 Boston University 6, No. 2 Minnesota 3

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Springfield, Mass., regional

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Thursday’s games

No. 1 Denver 2, No. 4 Massachusetts 1

No. 3 Cornell 3, No. 2 Maine 1

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Saturday’s game

No. 1 Denver 2, No. 3 Cornell 1

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Providence, R.I., regional

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Friday’s games

No. 1 Boston College 6, No. 4 Michigan Tech 1

No. 3 Quinnipiac 3, No. 2 Wisconsin 2 (OT)

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Sunday’s game

No. 1 Boston College 5, No. 3 Quinnipiac 4 (OT)

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Maryland Heights, Mo., regional

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Friday’s games

No. 1 Michigan State 5, No. 4 Western Michigan 4 (OT)

No. 3 Michigan 4, No. 2 North Dakota 3

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Sunday’s game

No. 3 Michigan 5, No. 1 Michigan State 2

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Frozen Four

National semifinals & finals

at St. Paul, Minn., Xcel Energy Center

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Semifinals

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TODAY

Denver (30-9-3) vs. Boston University (28-9-2), 5 p.m. EDT (ESPN2)

Michigan (23-14-3) vs. Boston College (33-5-1), 8:30 p.m. EDT (ESPN2)

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National championship

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Saturday, April 13

Semifinal winners, 6 p.m. EDT (ESPN2)