LOS ANGELES (AFP) — Kim Sei-young birdied six of the first 10 holes on her way to a six-under par 66, grabbing a one-stroke lead after Wednesday's opening day of the LPGA Match Play tournament.

The 31-year-old South Korean has not won an LPGA title since the November 2020 Pelican Championship, which came a month after her lone major win at the Women's PGA Championship.

A revamped format for this year's event at Shadow Creek in Las Vegas features three rounds of stroke play with the top eight advancing to weekend match play.

Kim, ranked 39th, opened with a birdie, added another at the third hole and reeled off three in a row ending at the par-3 eighth.

She birdied to begin the back nine and answered her lone bogey at 14 with a birdie at the par-5 16th.

"It's a change, the format (of) first three rounds, and feels like a lot of things are going on," Kim said.

"It works today. The front nine I didn't expect I would play this well. I was just like, some holes, par is best, so I kind of play very smart. That's what I wanted to do, so it was a pretty solid round. I'm very happy with that."

Kim, who won her first of 12 career LPGA titles in 2015, has adopted a more cautious tone with her game rather than attacking the pins.

"But now I don't follow anymore because if you follow the hole it can be the water, so just kind of very safely play this week."

Philippine-born Japanese Yuka Saso is at fourth with 69 together with Australian Minjee Lee and Sweden's Anna Nordvist.

They are trailing Rose Zhang, who birdied her last four holes to gain the second spot, and fellow American Danielle Kang with 67.

"I felt like I was just really patient out there," Zhang said.

"I had a really good game plan coming in. You can't really go at pins on this golf course, so making sure that I have my targets and iron play was pretty exceptional. I really gave myself many opportunities out there."