Luke Fischer scored 12 points and converted an offensive rebound with 27 seconds left, Wisconsin missed a contested 3 on its next possession and Marquette held on for a 57-55 win on Saturday over its in-state rival.
The Badgers fouled quickly after forward Nigel Hayes' missed 3. Haanif Cheatham missed the front end of a 1-and-1, but the long rebound off the back iron caromed to 6-foot-11 center Fischer.
One last try for Wisconsin ended with 0.5 seconds left when an inbounds pass from midcourt sailed out of play.
The Golden Eagles (8-2) won their seventh straight game. This was a confidence-building win for a team that starts three freshmen, including star forward Henry Ellenson, who finished with 15 points and 11 boards.
Marquette let a 13-point lead early in the second half slip away before finishing strong on the road.
Vitto Brown led Wisconsin (6-5) with 15 points.