Former world No. 1 Caroline Wozniacki will have no further preparation before her final career appearance at the Australian Open after she withdrew Monday from the traditional warm-up tournament at Kooyong.

The 29-year-old Dane announced that she will retire after the Australian Open, where in 2018 she won her only Grand Slam title.

Now ranked 35th, Wozniacki was due to play in a select women's field at Kooyong but informed organizers Monday that she was withdrawing.

"She's pulled up a bit sore after playing [at the ASB Classic] in Auckland, so as a precaution ahead of the Open, she's decided not to play," tournament director Peter Johnston said.

Wozniacki reached the singles semifinals at the ASB Classic and the doubles final with long-time friend Serena Williams. It was the first time the two have combined in doubles.