If the Badgers win, they'll take on the winner of the match-up between Number Seven U-N-L-V and Number Ten Georgia Tech.
Marquette is an eight-seed in the east. The Golden Eagles will face ninth-seeded Michigan State.
The Number One seeds are defending champion Florida ... Ohio State ... Kansas ... and North Carolina.
Wisconsin plays Friday at the United Center in Chicago. Marquette goes Thursday in Winston-Salem, North Carolina.
Game times haven't been announced yet.