In the first 106 years of the U.S. Women's Amateur championship, no preteen had reached match play.
Now there are two and they face each other today.
Alexis Thompson and Pearl Jin ousted older opponents Wednesday to set up their second-round showdown at the Crooked Stick Golf Club.
"I'm really excited. I heard that she's a good player," said Jin, who turned 12 in June, four months after Thompson.
"It feels really good to be the youngest one. It's a little bit nervous," she said. "It's easy to get nervous out there. I just try to concentrate and be calm."
Jin, who took up golf at age 8 - after earning a black belt in tae kwon do - beat 20-year-old Ashley Tait 2 and 1 in the first round; Thompson got by 17-year-old Evan Jensen 3 and 2.
"I was a little nervous when it all started, but I've gotten used to it," Thompson said of her full schedule in the summer. "In these golf tournaments, I just go out there and play my game and don't worry about anything else and hope for the best."
Among the first-round teenage winners was Kristina Wong, a co-medalist.
Drinking a bottle of water about every two holes because of the heat, Wong beat Kaitlin Drolson 5 and 3 and easily advanced to the second round against Vicky Hurst.
"I'm getting used to it a little bit now," said Wong, a 16-year-old high school junior playing in the amateur event for the fourth time. "Still, I was just trying to find some shade. I feel good right now, but I know I have a long road ahead of me."