Held to three points in the first half, all on free-throws, Tucker took over when it counted for the Badgers (28-4, 13-3), hitting his three-pointers when the Spartans (22-11, 8-8) were bidding to pull even on the scoreboard.
Down 36-21 at halftime, Michigan State opened the second half on a 11-2 run to pull within five points at several points in the game.
But Tucker's shots stunted the Spartans offensive spurts and in the end were the difference on a night when Drew Neitzel scored only 10 points.
Neitzel went 3-for-13 shooting and was held scoreless in the first half. Just as it appeared that he got going after hitting his first three-pointer in the second half, Tucker immediately matched him on the very next possession with a three of his own.
Wisconsin jumped out to an early 10-0 advantage in the game on two three-pointers by Michael Flowers. Tucker shot 4-for-8 from deep and as a team the Badgers were 8-for-17 (47.1%) from three-point.
Although they showed life in the second half, the 15-point halftime deficit the Spartans dug themselves was just too much to overcome.