Keith Wright had 25 points, but it was Oliver McNally's jumper with 11 seconds left in double overtime that lifted Harvard to an 83-82 victory over Pennsylvania on Saturday night.
The Crimson (16-4, 5-1 Ivy League) led 35-24 at halftime, and by as many as 18 in the second half, but the Quakers rallied to tie it at 64 when Zach Rosen hit two free throws with 10 seconds left in regulation to force the first overtime.
Rosen had 19 points for Penn (9-9, 3-1), second only to Jack Eggleston's 23.
Miles Cartwright, who had 16 points for Penn, sent the game to a second overtime when he hit a jump shot at the buzzer.
Eggleston gave the Quakers an 82-79 lead when he hit a layup with 1:48 left in the second overtime. But Kyle Casey, who had 18 points for Harvard, made two free throws and McNally followed with the game's final points.