Freshman Jackson Koivun calmly drained a 3-foot on the third playoff hole at dusk Tuesday to beat Ohio State 3-2 in match play and send Auburn to the final of the NCAA men’s golf championships at Omni La Costa Resort & Spa’s North Course.

The No. 1-ranked Tigers will face Florida State, which won its semifinal against Georgia Tech under similarly dramatic circumstances. The final begins Wednesday at 2:25 p.m. and will be televised live on Golf Channel.

Koivun was 2-up with two holes to play, then watched Ohio State senior Adam Wallin birdie 17 and 18 to force a sudden-death playoff that started at the perilous par-3 16th over water into a narrow green. Both parred 16 and 17, and neither hit the green with his second shot into 18. But Koivun splashed a bunker shot to 3 feet, then made the birdie putt as his jubilant teammates charged off the hillside onto the green.

“We’re playing for so much here, obviously a national championship,” the 19-year-old Koivun, who won the Haskins Award as the nation’s top collegiate golfer, told Golf Channel. “I don’t want to let anyone down, my team, my school, my coaches. Coming down the stretch on 17 and 18, I made some hiccups to send it to extra holes. … I was definitely feeling the nerves.”

Wallin was in the same position in the morning quarterfinals against Vanderbilt’s Gordon Sargent, the world’s No. 2-ranked amateur, needing to win the 17^th and 18^th holes to force a playoff. He prevailed to put No. 32-ranked Ohio State into the semis and nearly did it again in the afternoon before Koivun held his nerve.

In the other semifinal, veteran Florida State coach Trey Jones boldly subbed in freshman Tyler Weaver for all-ACC senior Gray Albright for match play after Albright was used in all four rounds of stroke play. And Weaver responded with a pair of key wins in the quarters and semis.

“When you’ve sat on the sideline for four rounds, you’re ready to go and I think (Coach) knew that,” said Weaver, the ACC freshman of the year. “I was very eager to get out there.”

Weaver won 3-and-2 against North Carolina’s David Ford, then beat Georgia Tech’s Kale Fontenot on the first playoff hole.

Georgia Tech re-inserted Christo Lamprecht, the world’s No. 1-ranked amateur, after he was held out with back pain following the opening round of stroke play. Lamprecht had a 2-up lead through 13 against Florida State’s Luke Clanton, then lost the next four holes and was defeated 2-and-1.