MINNEAPOLIS, Minnesota (AFP) - American Stacy Lewis, who turned pro less than three weeks ago, fired a six-under 67 to seize a one shot lead after the third round of the US Women's Open on Saturday.

Playing in her first tournament as a pro, Lewis is not afraid to toot her own horn.

"To tell you the truth, I'm not really that surprised," Lewis said. "I felt I could play and compete at this level.

"I finished fifth at the (Kraft Nabisco Championship) last year and that really showed me I could play at this level."

American compatriot Paul Creamer is one shot adrift of the 23-year old Lewis at the major championship.

Lewis displayed composure on the Interlachen course despite strong winds Saturday.

Lewis moved to a nine-under 210 total, one stroke ahead of fellow Creamer (69), with Swede Helen Alfredsson (71) and South Korean Inbee Park (71) two shots behind.

Halfway leader Angela Park, of Brazil, shot 75 to slide five shots off the lead, while Annika Sorenstam left herself a steep hill to climb, seven strokes off the pace after a frustrating day on the greens.