Nelly Korda didn't miss a beat four days after her first LPGA Tour title on U.S. soil, outplaying her sister and the world's No. 1 player for a 5-under 67 to share the lead at the Drive On Championship.

Former NCAA champion Jennifer Kupcho managed a 67 despite playing most of the back nine with a migraine that blurs her vision. Austin Ernst also had a 67 at Golden Ocala.

More Images
Nelly Korda reacts to a missed putt on seventh green during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Nelly Korda didn't miss a beat four days after her first LPGA Tour title on U.S. soil, outplaying her sister and the world's No. 1 player for a 5-under 67 to share the lead at the Drive On Championship.

Jessica Korda lines up her putt during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

It's a small sample size, but this has been the year of the Kordas.

Nelly Korda watches her tee shot during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Since winning at Lake Nona — her fourth career victory and first domestic title — Nelly Korda did a little laundry, took it easy with nine-hole practice rounds at Golden Ocala, tightened up her swing and it was like nothing had changed.

Lexi Thompson watches shot from the 18th tee during the first round for the LPGA golf tournament at Golden Ocala Golf and Equestrian Club, Thursday, March 4, 2021, Ocala, Fla. (Cyndi ChambersOcala Star-Banner via AP)

There is no sibling rivalry with these two, and no bragging rights, either.

Jin Young Ko putts on the sixth green during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Golden Ocala is renowned for having replica holes from famous courses, three of them from Augusta National and two from the Old Course at St. Andrews.

Jin Young Ko hits off the first tee during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

“Honestly, about on 14 I was ready to get off the golf course,” Kupcho said.

Danielle Kang gets a ride during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

“Even right now, it’s really blurry,” Kupcho said. “I can’t really see anything over to the left. So, yeah, it’s definitely really hard. I pretty much just leaned a lot on my caddie and just trusted him and tried to do the best that I could.”

The third-ranked Korda was part of a featured group that played early before the cool morning yielded to warm sunshine. She played alongside her older sister, Jessica, who had a 69; and Jin Young Ko, the No. 1 player in women's golf who had a 75.

Nelly Korda reacts to a missed putt on seventh green during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Nelly Korda reacts to a missed putt on seventh green during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

It's a small sample size, but this has been the year of the Kordas.

Jessica Korda won a playoff to start the LPGA season at the Diamond Resorts Tournament of Champions. Nelly Korda had a three-shot victory last week in the Gainbridge LPGA at Lake Nona.

“Nelly and I were talking about being in a fish bowl today,” Jessica Korda said.

Jessica Korda lines up her putt during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Jessica Korda lines up her putt during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Since winning at Lake Nona — her fourth career victory and first domestic title — Nelly Korda did a little laundry, took it easy with nine-hole practice rounds at Golden Ocala, tightened up her swing and it was like nothing had changed.

Among her five birdies, she chipped in from 50 feet from the rough below the 10th green and down a ridge.

Jessica Korda had six birdies, but she had to rally after taking a double bogey on the par-3 11th hole that left her 2 over for the round. She closed with four birdies over the last seven holes.

Nelly Korda watches her tee shot during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Nelly Korda watches her tee shot during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

There is no sibling rivalry with these two, and no bragging rights, either.

“I think it’s just fun for us,” Nelly Korda said. “We have a lot of fun out there.”

It wasn't as much fun for Ko after she opened with a birdie. She shot 40 on the back nine and wound up with her highest start on the LPGA Tour since a 77 at Hazeltine in the 2019 KPMG Women's PGA Championship.

Lexi Thompson watches shot from the 18th tee during the first round for the LPGA golf tournament at Golden Ocala Golf and Equestrian Club, Thursday, March 4, 2021, Ocala, Fla. (Cyndi ChambersOcala Star-Banner via AP)

Lexi Thompson watches shot from the 18th tee during the first round for the LPGA golf tournament at Golden Ocala Golf and Equestrian Club, Thursday, March 4, 2021, Ocala, Fla. (Cyndi ChambersOcala Star-Banner via AP)

Golden Ocala is renowned for having replica holes from famous courses, three of them from Augusta National and two from the Old Course at St. Andrews.

Kupcho, along with her NCAA title at Wake Forest, captured the inaugural Augusta National Women's Amateur in 2019 with a back-nine charge. That day at the home of the Masters included her having to get through one of her migraines, in which her vision suffers.

Thursday was not much different.

Jin Young Ko putts on the sixth green during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Jin Young Ko putts on the sixth green during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

“Honestly, about on 14 I was ready to get off the golf course,” Kupcho said.

By then, she had already done enough right. Kupcho ran off four straight birdies, two short putts on the par 5s on the front nine sandwiched around a 10-footer on No. 6, and her final birdie was on the 13th.

She said she had three migraines during the offseason and never knows when one is coming. This one started as she was over a shot early on the back nine.

Jin Young Ko hits off the first tee during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Jin Young Ko hits off the first tee during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

“Even right now, it’s really blurry,” Kupcho said. “I can’t really see anything over to the left. So, yeah, it’s definitely really hard. I pretty much just leaned a lot on my caddie and just trusted him and tried to do the best that I could.”

Ernst got off to a rough start and was 2 over through four holes after back-to-back bogeys. She made seven birdies the rest of the way and shot 31 on the back nine.

Jing Yan of China and Jaye Marie Green shot 68, and Lydia Ko was in the group at 69 with Jessica Korda.

Danielle Kang gets a ride during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Danielle Kang gets a ride during the first round for the LPGA golf tournament at Golden in Ocala Golf and Equestrian Club, Thursday, March 4, 2021, in Ocala, Fla. (Cyndi Chambersin Ocala Star-Banner via AP)

Second-ranked Sei Young Kim and No. 5 Danielle Kang shot 72. Lexi Thompson and Brooke Henderson opened with 74s.