Bianca Andreescu has withdrawn from the Grampians Trophy singles draw, the WTA announced Monday.
The Aussie Open tuneup event, which starts Wednesday, was supposed to mark the Canadian's first WTA appearance in 15 months.
Andreescu was set to enter the tournament as the top seed despite her lengthy absence.
The 20-year-old has not appeared at a Grand Slam since winning the 2019 US Open.