World number three golfer Stacy Lewis shot a 65 to move into the lead at the halfway stage of the Omega Dubai Ladies Masters on Thursday.
Lewis, winner of the Ricoh British Women's Open at St Andrews earlier this year, put together a round including eight birdies and just one bogey to finish nine under par at Emirates Golf Club, one shot ahead of Sweden's Pernilla Lindberg.
Lindberg, who shared the lead after the first round with Mireira Prat and Carlota Ciganda, added a 69 to her opening 67 to lie second, a shot ahead of Spain's Ciganda.
Thailand's Pornanong Phatlum is another stroke back on six under before a three-shot gap to the chasing pack containing Scotland's Vikki Laing and English veteran Laura Davies.
Lewis said: "Putts went in today. I made a little adjustment on the practice green and it seemed to work. I made a couple of long ones that I probably shouldn't have made and it turned out to be a good day.
"On the longer putts the grip handle was stopping, so I changed that. I think I had 10 or 12 fewer putts and that made the difference. I think I had 24 putts today instead of 33.
"The course played a lot shorter from the tee and most of the greens I could reach in two. The greens were firmer but I had shorter clubs. I have to keep going and take care of the business, but I prefer being where I am now to where I was last night."