PORTLAND, Ore. (AP) -- Defending champion Brooke Henderson and Sweden's Suzann Pettersen share the lead at 11-under 133 after Friday's second round of the LPGA Cambia Portland Classic.
Pettersen shot the day's low score with an 8-under 64, while No. 2 Henderson, an 18-year-old Canadian who won her first LPGA Tour event last year in Portland, shot 68 at Columbia Edgewater.
Pettersen and Henderson, who have combined to win three of the past five Portland Classics, lead by one stroke over Colombia's Mariajo Uribe, who shot 67.
The No. 18 Pettersen, playing in the morning, had eight birdies on a bogey-free card. Henderson, playing in the afternoon, caught Pettersen when she rolled in a 10-foot birdie putt at the par-4, 393-yard 18th.
Henderson has shared or held Portland's outright lead the past five rounds, dating back to last year's second round.
Pettersen is no surprise on the Portland Classic leaderboard. Pettersen has posted top-five finishes in four of her past seven Portland tournaments, winning in 2011 and 2013.
Austin Ernst, Pernilla Lindberg and Angela Stanford are five shots back at 6-under. Ernst, the 2014 Portland champion, shot 66, while Lindberg had 68 and Stanford a 71.
Lee Lopez (68), Prima Thammaraks (69) and Carlota Ciganda (71) are 5 under. Among a group of seven at 4 under are Kelly Shon, Cheyenne Wood and Jaye Marie Green. Shon made eight birdies on her way to a 66.
Pettersen is bidding to become the tournament's second three-time winner, joining Nancy Lopez, who won in 1985, 1987 and 1992. The Portland Classic is the LPGA Tour's longest-running non-major, now in its 45th year.
Pettersen collected her birdies in bunches. Starting on the back nine, she made four consecutive on holes No. 12-15. Pettersen finished strong, making birdies on three of her final four holes, closing with a 20-foot birdie putt at the par-4, 410-yard ninth.
Henderson did most of her damage on the par-5s, making birdies on all four. After a bogey at the par-4, 397-yard 17th, Henderson smacked her drive into the left rough at 18. Hitting from under a tree, Henderson blasted a low-running 6-iron from 165 yards to 10 feet, then finished by making the birdie putt.
Christina Kim shot 66 to finish at 3 under, a group also includes Vicky Hurst (71), Chella Choi (71) and Lee-Anne Pace (72).
No. 9 Stacy Lewis is 2 under after a 70. American Morgan Pressel shot 71 to finish at 1 under.
Among those who didn't make the cut at 1 over are Americans Cristie Kerr, Lizette Salas and Marina Alex.