The American drained three eagles en route to carding an 11-under 61, a new course record for La Reserva Club.
Three birdies on either side of the turn helped cement a historic day for the 29-year-old, who holds a five-stroke lead in the second round of the individual event.
“It was a terrific round,” Korda told reporters. “We had a great atmosphere in the group and so obviously I was really relaxed.
“I’ve never done three eagles in one trick, so I’ll definitely remember this one!”
A bogey on the eighth hole marked the world No. 1’s only blemish. 14’s, reducing his chances of shooting the first ever sub-60 score on the Tour.
“I still did a bogey and hit it into the obstacle, so I wouldn’t say every aspect was working,” Korda said.
“Over the last month and the change I think I haven’t really converted any putts and the floodgates have opened today and hopefully they can continue tomorrow and that’s the beauty of golf. ”
Belgium’s Manon De Roey and Slovenia’s Pia Babnik lead the chasing pack after registering six under-66s.
Korda’s sister Nelly is another shot behind after shooting 67, with a double bogey on the par-five sixth hole nullifying an eagle on the second. The world number. 3 shares fourth with the French Pauline Roussin.
“I played pretty well,” Korda said. “It’s my first time in Spain and it blew my mind, it’s super nice.”
The 54-hole individual event runs alongside a 36-team event, in which a team of four – including one amateur – compete, with the best two scores per hole counting. Each event offers a prize pool of $500,000.
In October 2021, Jessica Korda led her group to victory in the team event at Glen Oaks Club, New York, in the first Ladies European Tour event to be held in the United States.
Now 10 months later in Sotogrande, she is well placed to repeat the feat after her side – consisting of Finland’s Noora Komulainen, Czech Tereza Melecka and amateur Malcolm Borwick – finished 19 under to lead by a mid-shot.
“We had a good atmosphere in the squad, we kept it very loose there,” Korda said.
“I know the girls were a little nervous at first, but I told them there was no point in being nervous and going out there and having fun and playing golf.
“We are in Spain and the weather is good, we are lucky to be here.”
The teams of Roussin and De Roey trailed suddenly before the deciding round on Friday.