World No. 1 Nelly Korda is on fire—and she's not slowing down. Fresh off her third major victory at the Chevron Championship, the 27-year-old American closed Friday's second round of the LPGA Riviera Maya Open with a birdie to grab a share of the lead. Her bogey-free 5-under 67 left her at 9-under 135 through 36 holes at El Camaleon Golf Course in Playa del Carmen, Mexico.

"It was a good day," Korda said. "Drove it really well. Hit it to the right spots on the green and capitalized on some good shots."

Korda is tied with fellow American Brianna Do, who carded a 69 in pursuit of her first LPGA title. Right behind them is Melanie Green, just one stroke back at 136 after a 70, while Japan's Minami Katsu sits alone in fourth at 137 following a 68.

This is the kind of run that defines a champion. Korda also won the LPGA season-opening Tournament of Champions and has finished second in her other three starts this year. She began the day two strokes behind co-leader Do but quickly made her move, birdieing the second, fifth, and eighth holes before adding two more at 14 and the par-5 18th.

"Overall just a solid day," Korda said. "Didn't make any mistakes really. If I did, I bounced back really well."

Do started her round on the back nine with back-to-back birdies, then added more at the par-3 15th and par-4 second before a closing bogey. "I started with two birdies on 10, 11, my first two holes, and that really got things going," she said. "Kind of a lull in the middle on the back nine, but kept it together and shot three-under, so good round. Solid."

Spain's Carlota Ciganda and China's Liu Yu (who shot 66) share fifth at 138, while a group at 139 includes Germany's Olivia Cowan, Mexico's Gaby Lopez, Paraguay's Sofia Garcia, and Thailand's Arpichaya Yubol. With Korda in the mix, this weekend promises plenty of drama—and maybe another trophy for the world's best.