Published: Jul 29, 2011 10:00 PM EDT
Updated: Jul 30, 2011 6:30 AM EDT

CARNOUSTIE, Scotland (AP) - Germany's Caroline Masson shot a 7-under 65 Friday to take a surprising one-stroke lead after the second round of the Women's British Open.

Playing in the last group of the day, the 22-year-old Masson had seven birdies without a bogey on the Carnoustie Golf Links to move to 11-under 133, one stroke ahead of South Korea's Inbee Park and Meena Lee.

Masson, competing in only her second season on the European Tour, had four birdies in a front-nine 32.

Park shot a 64 while Lee, who started the second round with a two-stroke lead, closed with two birdies in a 69.