Christian Watford has 11 points as Indiana leads Northwestern 31-17 at halftime Sunday at Welsh-Ryan Arena.
Cody Zeller and Jordan Hulls both have seven points for the No. 2 Hoosiers.
Snider graduate Reggie Hearn has nine points to lead Northwestern.
The Wildcats shot just 30.4 percent from the floor (7 for 23) in the half.