By Sunday morning, the line had grown to as high as Villanova -7.5 at some books.
The Wildcats are in the championship game for the second time in three years. They advanced with an impressive 95-79 win over Kansas on Saturday. They won their first five tournament games by an average of 17.6 points per game.
Michigan has won 14 in a row. The Wolverines have been underdogs in nine games this season and went 5-4 straight up in those games.
The over/under for Monday's championship game opened at 143.5 at the Westgate SuperBook in Las Vegas, then quickly climbed to 145.5.