EDINA, Minn. (AP) -- Stacy Lewis is making her professional debut one to remember.

Nineteen days after she turned pro, Lewis showed the poise of a veteran Saturday at Interlachen with no bogeys and a 6-under 67 that gave her a one-shot lead over Paula Creamer going into the final round of the U.S. Women's Open.

Lewis, a former NCAA champion at Arkansas, might have been the only one not surprised to see her name atop the leaderboard.

"I've accomplished my goal for the week," Lewis said. "It was just to put myself in contention. And whatever happens tomorrow, it happens. I hope I win. I want to win ... probably more than anybody here. But I have to hit a lot of good golf shots before I win this golf tournament."

And she will have to hold off a half-dozen players within four shots of the lead, starting with Creamer.

Creamer is two years younger but already in her fourth season on the LPGA Tour with six victories, enough for some to already anoint the 21-year-old product of a golf academy as the best player without a major.

She had a chance to share the 54-hole lead with Lewis until missing a 6-foot birdie putt on the 18th for a 69.

Lewis was at 9-under 210, setting up an All-American final group at the U.S. Women's Open for the first time in five years.