Ohio State blew an 18-point lead, but somehow still found a way to beat Purdue in overtime.

The Buckeyes were rolling through the first half of Friday’s quarterfinal showdown in Indianapolis, taking a 49-31 advantage into halftime, thanks in large part to Kyle Young. The senior forward scored 18 points and buried 4 shots from 3-point land to get Ohio State out to the big lead.

But when Young left the game with an apparent head injury after taking an elbow from Trevion Williams to the head, things fell apart for Ohio State. Purdue stormed all the way back, tying the game at 72-72 and forcing overtime in a thrilling game.

Duane Washington Jr. and Seth Towns hit some big shots in the overtime period and the Buckeyes did just enough to hold off the Boilermakers, winning 87-78. It sets up a rivalry matchup with top-seeded Michigan on Saturday in the semifinal round.

Washington was the team’s leading scorer, getting 20 points and grabbing 5 rebounds in the win. Young was still the team’s second-leading contributor with 18 points, all coming in the first half. Three other Buckeyes reached double figures, with E.J. Liddell scoring 17, Towns adding 11 and CJ Walker chipping in 10.

Trevion Williams had a monster performance for Purdue, scoring 26 points and grabbing 14 rebounds in the loss. Jaden Ivey had 19 points and Zach Edey had 11 off the bench.

Ohio State will now play Michigan for a chance to play for the B1G Tournament title on Sunday. Michigan won the only matchup of the regular season 92-87.