Two-time champion Naomi Osaka out of Australian Open

(Photo by Robert Prange/Getty Images)

Naomi Osaka has withdrawn from the Australian Open, it was announced on Saturday.

Tournament organizers confirmed her withdrawal in a tweet on Sunday.

Osaka, a four-time Grand Slam champion and two-time Australian Open champion, has not played in a tournament since September. She withdrew during the second round of a Tokyo tournament after winning her first-round match.

The 25-year-old currently sits at No. 47 in the world and has not advanced past the first round in each of her three previous tournaments, including the US Open.

Ukraine’s Dayana Yastremska has been called up to the main draw in her place.

Her absence adds to what is a growing list of leading players to pull out of the tournament. Former finalist Simona Halep will not play while Venus Williams had to pull out with an injury after receiving a wild card.