World number one Stacey Lewis is far more concerned with winning another major rather than maintaining her position at the top of the LPGA rankings at the Kraft Nabisco Championship this week.

The American won her first LPGA title at the first major of 2011 at the Mission Hills Country Club and finished ahead of then world number one Yani Tseng.

That victory kick-started the 28-year-old's career in dramatic fashion and after winning the LPGA Founders Cup in Phoenix earlier this month, she usurped the Taiwanese star as the world's top female player.

However, Lewis is more concerned about her game rather than focusing on achieving sufficient ranking points to maintain her top rank.

"There are so many things that I can't control. I can't control how Yani plays, how In-bee Park plays," she said ahead of Thursday's opening round in California.

"If they go out and play better than me, then I lose the number one ranking... If I go out there and take care of myself, I'll be at that number one ranking."

This week will be the first time in more than two years that Tseng tees off at a major without the number one ranking, but she maintains that she is happy to play without the pressure of being the world's top player for once.

"The first couple of days were weird. I was very emotional after that couple of days after I lost world number one, but after that I felt, like, total relief.

"I just want to win a tournament," Tseng continued. "I feel good about this week. I feel I have a chance to win, but I just want to go out there and try to do my best, play one shot at a time, and hopefully the results will come."

Another player to watch is New Zealand teenager Lydia Ko, who lines up alongside Michelle Wie for the first two rounds at this year.

While the Kiwi sensation insists she is "just having fun" after becoming the youngest winner in US LPGA history earlier this year, she will without a doubt be someone not to under-rate.

"Obviously I'm trying my best out here, but I've come here for experience," said the 15-year-old.

"I think it's really fun, and I get to see a little bit of what being on tour is like as well. It's been really fun to be able to play a couple of the tournaments."

Despite her tender age, Ko won't be the youngest competitor in the field. That honour belongs to the 14-year-old Angel Yin, who qualified for her first major after carding a under-67 in qualifying on Tuesday at Mission Hills.

Golf 365