Australia's Ashleigh Barty hits a return to Denmark's Clara Tauson during their 2021 US Open Tennis tournament women's singles second round match at the USTA Billie Jean King National Tennis Center in New York on Sept 2, 2021. (ANGELA WEISS / AFP)

LOS ANGELES - World number one Ash Barty on Thursday withdrew from the Indian Wells and the Miami Open tennis tournaments, saying her body has not recovered after her January triumph at the Australian Open.

Ashleigh Barty has struggled with shoulder, back and foot injuries during her career, in which she has won three different Grand Slam events

The 25-year-old Australian has struggled with shoulder, back and foot injuries during her career, in which she has won three different Grand Slam events.

"Unfortunately, my body has not recovered the way I'd hoped after the Australian Open and I have not been able to adequately prepare for Indian Wells and Miami," she wrote in a message on Twitter.

"I don't believe I am at the level necessary to win these events and as a result I have decided to withdraw from both tournaments," she said.

"I love these events and am sad not to be there competing but getting my body right must be my focus."

Australia's Ashleigh Barty poses with the 2022 Australian Open winner's trophy in Melbourne on Jan 30, 2022, following her victory over Danielle Collins of the US in the women's singles final of the tennis tournament. (MARTIN KEEP / AFP)

Barty's opponent in the Australian Open final, top-ranked American Danielle Collins, also withdrew from Indian Wells on Thursday, citing a "continuing injury".

READ MORE: Barty ends 44-year wait for home champion at Australian Open

The Indian Wells main draw begins next week with the Miami Open following at the end of the month.