Charley Hull has been forced to withdraw from the second women's major of the year after testing positive for coronavirus.
Hull will not play in the ANA Inspiration event, which begins on September 10, after recording a positive test.
In a series of tweets, the world number 28 said: "As part of the LPGA TOUR's Covid-19 testing process, I was informed this morning that I tested positive for Covid-19 and I have withdrawn from the ANA Inspiration.
"I didn't feel great yesterday but I put it down to jet lag, the heat and my asthma playing up. I now realize I have some mild symptoms which feel similar to having a cold and I am self-isolating and working with Tour on contact tracing.
"I am very disappointed to have to withdraw from what is one of my favorite events of the year but wish everyone the best of luck at this week's tournament and look forward to when I can return to playing on Tour."
Hull concluded second in the event four years ago but will be denied the opportunity to improve on that performance this weekend.
LPGA coronavirus protocols dictate the 24-year-old must quarantine for 10 days before being assessed by a medical team to be cleared to return to play.
This year's edition of the ANA Inspiration will also be without world No 1 and defending champion Jin Young Ko, who has indicated not to engage in the travel protocols required by both South Korea and the United States because of coronavirus.
The LPGA Tour said everyone else has returned negative results for the coronavirus test, pending the results of one player and one caddie.
The ANA Inspiration is typically played the first weekend in April. It was moved to September when the COVID-19 pandemic shut down the LPGA Tour for some five months.
