GRAND RAPIDS (REUTERS) - South Korean Chun In Gee reeled off four birdies in five holes on the back nine to vault into a share of the third-round lead with American Lexi Thompson at the Meijer LPGA Classic on Saturday.
Reigning US Women's Open champion Chun matched the low round of the day with a bogey-free six-under 65, while defending champion Thompson had a 66 at the Blythefield Country Club in Grand Rapids, Michigan.
At 15-under 198, they enjoy a one-shot advantage over South Korean Kim Sei Young, who equalled the 65 by Chun and Feng Shanshan of China.
"Today my iron shot great," Chun told reporters. "I like putting very well. I was so good at rolling the ball on the line."
The 21-year-old, a rookie on the LPGA Tour, roared home with birdies at the 11th, 12th, 14th and 15th holes.
Thompson started well with three birdies in the first eight holes of her bogey-free round. She has gone 33 under in her last seven rounds at Blythefield.
"I just hit a lot of drivers, and if my game's on, it comes together," she said.
Thompson, 21, is seeking her second win of the season and eighth of her LPGA career. Her victory at the Honda LPGA Thailand in late February was the only win by an American on the 2016 LPGA Tour.
Spaniard Carlota Ciganda will start the final round two strokes from the lead, with world No. 1 Lydia Ko of New Zealand four back after a 67.
Canadian Brooke Henderson, winner of the Women's PGA Championship last week, is nine behind after a 72.