The Bobcats moved to a game and a half ahead of the Knicks after defeating Indiana last night.
Southern California defeated Indiana in straight sets, setting up an all-Pac-10 regional final.
But even if they lost in Milwaukee, they could clinch a spot by defeating Indiana.
The Pirates won their two opening-round games, and defeated Indiana in a regional semifinal.
Indiana State, which defeated Indiana this season, had lost 11 consecutive games before the latest upset.
They defeated Indiana, and St. Joseph, before losing to Navy 71-70.
Wisconsin opened the season by defeating New Mexico State and Indiana.
(Michigan also defeated Indiana by an identical 58-0 score in October 2000.)
In last years meeting, Purdue defeated Indiana by a score of 33-25.
They defeated Indiana, a five-time national champion and the winner of the last two titles, by 2-1 in three overtimes on Friday.