Paul swiped the ball from Ralph Sampson III for the dunk that gave the Illini (12-2, 1-0 Big Ten) a three-point cushion at 73-70. Leonard's layup with 1:11 left made it 78-72 and finished the Golden Gophers (12-2, 0-1).
Paul finished with 21 points. Leonard had 20 and a game-high 11 rebounds for his third straight double-double.
Sampson led Minnesota with a game-high 22 points plus nine rebounds. Julian Welch added 15 points.
The Illini led by 13 midway through the second half before the Gophers stormed back to tie it with just over 6 minutes to play on a 3-pointer by Welch. A pair of Leonard free throws with 7 seconds left sent the game to overtime.
Colosseum Athletics Men's Illinois Fighting Illini Blue Layup ShortsPrice: $24.99 Shop
Virginia coach Tony Bennett takes the ACC Fast Break with Dino Gaudio by answering questions like who the best Tony Bennett is and what other sport he'd like to coach.
Definitely not inspired by any popular TV shows, we looked up the best moments a team came back from the dead.
The guard prospect was one of the top players at the annual Spiece Run N Slam event.