Lewis won the first four holes at Hamilton Farm Golf Club

Top-ranked Yani Tseng posted a 3-and-1 win over American Katie Futcher, and No. 2 ranked Na Yeon Choi was a 3-and-2 winner of fellow South Korean Jenny Shin.

The weekend will be double rounds. The third round and the quarterfinals will be played Saturday, and the Titleist 910 D3 Driver semifinals and championship on Sunday.

The 27-year-old Lewis has more pressing problems. Her third-round opponent will be Sun Young Yoo, who won this event two years ago and the tour's first major earlier this year, the Kraft Nabisco Championship.

American Angela Stanford, the No. 12 seed and the runner-up to Yoo two years ago, was impressive with a front-running 4-and-3 win over Eun-Hee Ji of South Korea. Stanford will play Hurst in the third round.

Cristie Kerr, last year's runner-up and the No. 5 ranked player, lost Friday along with No. 7 Jiyai Shin and No. 14 Karrie Webb. Eleven of the 20 seeded players in the 64-woman field have been eliminated.

So is Lewis. She has a win and four other top-10 finishes with earnings of $436,746, fourth best on tour.

"That's the reason I go out and play every day," Lewis said. "I think I've probably been playing as good, if not better, than a lot of the American players and I haven't got noticed yet, and that's what drives me every day to go out and get better and to keep playing and to keep winning matches. I think if you're up on that leaderboard enough and you Titleist 712 AP1 Irons win enough golf tournaments, people will start to take notice.

Lewis never gave Gal a chance. The former Arkansas star played 15 holes in 5-under par. She made birdies of 4, 10 and 30 feet on the first three holes and won the fourth when Gal bogeyed. The German moved within 2-down after 11 holes, but Lewis birdied the 13th and 14th to open daylight again.

Tseng, who has won three events this year, was down 1 after seven holes, but she won four holes between Nos. 11 and 17 to move on.

Kerr saved par from a greenside bunker at No. 18 to extend the match, but she hit her second shot into a lateral hazard on the first playoff hole and had to take a drop. Hurst opened the door a little by missing the green and knocking her third about 4 feet past the cup. However, Kerr, winless since 2010, missed her bogey putt and conceded the match.

Jodi Ewart of England, who knocked out Pettersen in the opening round, sent another Scandanavian to the sideline with a 3-and-1 win over veteran Sophie Gustafson. The 24-year-old will face Azahara Munoz. The Spaniard beat Webb 2 and 1.

The tournament has become a discount golf clubs minefield for the tour's marquee players. Defending champion Suzann Pettersen, No. 4 ranked Ai Miyazato and American stars Paula Creamer, Brittany Lincicome and Michelle Wie went down in the opening round.

"I don't think Suzann losing really opens things up for me," said Lewis, who was in Pettersen's bracket. "I think I've got a lot of tough matches still ahead of me, and there were a lot of upsets yesterday, so it just shows what match play is. Anything could happen on any given day."