A bogey-free six-under 66 has Australian Katherine Kirk just one shot off the lead after the opening round of the LPGA Tour event in Arkansas.
Kirk's round include a string of three birdies on 10, 11 and 12 with the others at the 2nd, 7th and 16th holes.
She is in a six-way tie for fourth.
The three co-leaders at seven-under are Swede Anna Nordvist and American duo Esther Lee and Jackie Stoelting.
Minjee Lee and Sarah Kemp are in a big group at two-under after rounds of 69 while Su Oh (70) is the only other Australian under par.
Sarah Jane Smith (71) is even while Hannah Green carded a one-over 72.
Lee, the world No.5, said on Thursday she was still adjusting to the heavy schedule of play - playing her fifth event in as many weeks - since the season resumed after six months of no competitive golf.
"I haven't had this kind of long stretch in a while and especially with the time changes and just travel-wise," Lee told LPGA.com.
"I think my body is kind of adjusting and my mind a little bit is adjusting as well. I feel good, but probably a little bit on the tired side."
For Stoelting Friday was a welcome return from a 14-month maternity break.
Playing in the first group of the day off the 10th tee at Pinnacle Country Club, she fired an opening nine five-under 30.
"Didn't really have many expectations, but also have an extremely different perspective on life now that I'm a mum," Stoelting said.
Coming off the Women's British Open last week, the tour is taking a break next week before the year's next major, the ANA Inspiration in California, tees off on September 10.