Stacy Lewis will be more concerned with adding another major title to her resume at the Kraft Nabisco Championship this week than with retaining her world No. 1 ranking.

Lydia Ko showed playing partner Stacy Lewis a lot more than a great golf swing in the 15-year-old's historic Canadian Women's Open victory.

American Stacy Lewis birdied five holes on the back nine on Friday en route to a five-under 67 that gave her a one-shot lead in the Mobile Bay LPGA Classic.

South Korean Amy Yang fired a six-under 66 on Thursday to take a one-shot lead over Australian Lindsey Wright after one round of the LPGA Kraft Nabisco Championship.

World number one Yani Tseng of Taiwan played a seven-hole stretch in seven-under on Thursday, her seven-under 65 giving her a share of the LPGA Founders Cup first-round lead with South Korean Hee Young Park.