World No.1 Park Inbee of South Korea and second-ranked American Stacy Lewis will fight for the top spot again this week at the inaugural Texas LPGA Shootout that starts on Thursday.

The $US1.3 million event is the first LPGA stop in the state in more than 20 years and features 144 players with a cut to the top 70 and ties after 36 holes, and a second cut to the low 50 and ties after 54 holes.

Seven-time major winner Karrie Webb will spearhead the Australian contingent.

Lewis has won two titles this season and became the first US player to claim the top ranking, holding the spot for four weeks until Park took over one week after her major victory at the Kraft Nabisco Championship earlier this month.

“For sure I’m really happy with that,” Park said.

“I’m very happy with the way I played with the pressure.”

Park won her first major title at the 2008 US Open and also won last year’s LPGA Championship, a crown she is set to defend in June.

In the past 10 months she has won four times and finished in the top 10 on another 11 occasions worldwide.

And staying as world No.1 is in her thoughts.

“I am concerned about number one just because I could lose the spot in one week or two weeks,” Park said. “I try not to think about it too much, but it’s in my mind for sure. That’s something I play for every week.

“I’m just very honoured that I can play for number one every week, just happy to be one of the players that plays for number one. That’s very good and something very special.

“It would be nice if I could continue for a long time in the number one spot but number one spot is some spot that you got to come down at some point. You can’t be number one forever.”