July 11-14
Highland Meadows Golf Club, Sylvania, Ohio
$1,750,000
Round 2, Round 3, Round 4

Canada's Alena Sharp and South Korea's Youngin Chun are tied for the Marathon Classic lead at 7-under 64 after the first round, a stroke ahead of Stacy Lewis and three others at Highland Meadows Golf Club.

The 38-year-old Sharp, who has yet to win on the LPGA Tour, fired eight birdies and a bogey.

"I played really well right from the first tee shot," Sharp said. "I felt really calm this morning coming into this event. I always love playing here. I have great housing."

19-year-old Chun, also seeking her first LPGA Tour victory, had a bogey-free round.

"I didn't know I shot 64 today," Chun said. "The funniest thing I finish par on the 18 and then I saw the leaderboard and there is a 7-under and I was like, 'Who is that?' I asked my dad. 'I think I shot 6, right?' He said, 'No, you're 7.' So it was me."

Toledo native Lewis, who took a break last year to start her family, won the last of her 12 LPGA Tour titles in 2017.

"It was awesome," Lewis said. "The biggest thing is I hit 18 greens today. I've been working on the ball-striking a lot, so just really nice to see some results. Got a few putts to fall there on our last few holes."

The Texan had seven birdies and a bogey.

"It's a golf course I'm not necessarily 100% comfortable on," Lewis said. "I just had some really good golf shots today. Had some easy tap-in birdies. I haven't done that in the long time, in general."

Azahara Munoz, Caroline Masson and Jenny Haglund matched Lewis at 65.

Lexi Thompson fired a 66 alongside U.S. Women's Open champion Jeongeun Lee6, Carlota Ciganda and Clariss Guce.

Thompson is coming off a two-week break.

"I played five weeks straight before that and really I've never played five weeks in a row in my career," Thompson said. "It was definitely different for me. But two weeks off just relaxing, hanging out with my family and friends, just making sure I get that relaxing time was much needed. I felt good about my game coming into this week."

Defending champion Jasmine Suwannapura opened with a 70.

Yealimi Noh, the 17-year-old from California who tied for sixth last week in Wisconsin in her LPGA Tour debut, had a 73. Playing on a sponsor exemption after Monday qualifying last week, she had five birdies and seven bogeys.