Stacy Lewis and Yani Tseng share the lead at 5-under par after one round of the LPGA's Walmart NW Arkansas Championship.
Tseng, the world's No. 1 player and the defending champion, eagled the par-5 18th hole with a downhill 6-foot putt to cap her round. Lewis, playing one group behind, birdied the 18th with a 5-foot putt to tie for the lead at Pinnacle Country Club.
Lewis, a former All-America at Arkansas and the hometown favourite, had three birdies in her last four holes.
After Lewis made her final birdie putt, she pumped her fist and the large gallery around the green erupted in cheers, chanting Arkansas' "Woo Pig Sooie!"
Lewis hit 17 of 18 greens during the round, but took 30 putts.
Karen Stupples, Taylor Leon and Jin Young Pak were all at 4 under. Suzann Petterson, the world's No. 2 player, was another stroke back in a group of nine that included Paula Creamer and Morgan Pressel.
Leon birdied the first two holes and held the lead for most of the day at 4 under.
Pettersen went to the 18th tee tied for the lead, but she made a bogey after landing in a green-side bunker in two shots and then taking three putts.
Canadian Adrienne White is three back after four birdies and two bogeys for an opening round 69. The Red Deer, Alberta golfer has missed the cut in both her LPGA appearances this year including two weeks ago at the CN Canadian Women's Open, where she also opened with a 69.
Alena Sharp of Hamilton, Ont., opened with a 1-under 70. Coming off her win last week at the PGA Women's Championship of Canada, Sharp carried that momentum into her opening nine holes Friday with four birdies and making the turn in 32. However, she gave it all back with four bogeys over a six hole span before closing with a birdie on No. 18.
Lisa Meldrum of Montreal opened with a 72.
Lorie Kane of Charlottetown, who missed last week's Women's Championship with a hip injury, Jessica Shepley of Oakville, Ont., and Stephanie Sherlock of Barrie, Ont., sit at 2-over par.
Samantha Richdale of Kelowna, B.C., struggled to an opening round 7-over 78.
Michelle Wie, who finished second here last year, had six bogeys and a double-bogey to shoot 78 as well.
Sweden's Pernilla Lindberg, who finished at 2 under, recorded a hole-in-one on the 190-yard 11th. It was the second hole-in-one professionally for the second-year pro and third in her golfing career.
"It was right at the pin the whole way, but since it was early in the morning, the sun was pretty low and I couldn't see anything," said Lindberg, 25. "I saw a bounce that was pretty straight to the pin. They were kind of excited up there, but not hole-in-one excited."