Sam Dekker scored 17 points, Nigel Hayes' acrobatic tip-in with 20 seconds left capped his 15-point day, and No. 2 Wisconsin needed to rally in the second half to beat Georgetown 68-65 on Thursday in the Battle 4 Atlantis semifinals.
The Badgers hadn't trailed in the second half this season, but found themselves down 53-44 with 11:36 left. A 22-6 run put Wisconsin (5-0) up for good, and the Badgers could finally exhale when D'Vauntes Smith-Rivera's 3-pointer rimmed out as time expired.
Smith-Rivera, who was 5 for 5 from beyond the arc until the game's final shot, led all scorers with 29 for Georgetown (4-1).
Wisconsin faces Oklahoma in Friday's title game. Georgetown, which got 10 points from Joshua Smith, will play Butler in an all-Big East matchup for third place.
Bronson Koenig tied a career best with 14 points for Wisconsin, which survived despite a six-point, 1-for-8 shooting day from standout center Frank Kaminsky.