Nigel Hayes added 15 points and 10 rebounds to give Wisconsin (20-3, 9-1 Big Ten) a one-game lead over Maryland for first place in the Big Ten as teams begin the second half of the conference schedule.
The Badgers slogged through another tough day shooting and have shot under 44 percent in seven of their last 12 halves of basketball, but leaned on their All-American candidate to provide the lift.
The only major conference player to lead his team in points, rebounds, blocks, assists and steals in conference play, Happ delivered his third block on Robert Johnson (5-for-15) with 2:35 remaining, and managed to call a 30 second timeout before falling out of bounds.
And when he was doubled in the post, Happ fed to an open Zak Showalter, whose 3-pointer with 1:37 remaining gave the Badgers a 58-50 lead. He finished with seven rebounds, three steals and two assists.
For much as the offense struggled, Wisconsin pieced together points on five straight possessions in the second half, ending with a Bronson Koenig 3-pointer to give the Badgers a 45-37 lead with 8:05 remaining.
UW never trailed in part because it connected from the free throw line. Entering the game shooting 65.7 percent from the field, the Badgers finished 23-for-31 from the line, including 7-for-8 in the final 51 seconds.
Josh Newkirk scored 22 points to lead Indiana (15-9, 5-6), which hasn’t won in Madison since 1998.
Wisconsin will travel to Nebraska on Thursday for an 8 p.m. tip off on Big Ten Network.
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