Bianca Andreescu’s long absence from competitive tennis will continue for another week after the 2019 U.S. Open champion withdrew from the Grampians Trophy event scheduled to start Wednesday.

The 20-year-old Canadian hasn't played since the 2019 WTA Trophy because of knee and foot injuries, and is coming off a hard lockdown in Melbourne.

“Following the last two weeks in quarantine, it feels so good to finally be back on the court,” Andreescu said in a statement. “After discussing it with my team, we have decided to focus this week on training for the Australian Open and miss the Grampians.

“Many thanks to Tennis Australia and the WTA for their hard work in providing us all of these choices. See you all at the Australian Open!”

Andreescu was among the 72 players forced into the hard lockdown after being deemed a close contact of passengers on their charter flights who returned a positive test for COVID-19 after arriving in Australia last month. Her coach, Sylvain Bruneau, was among those who tested positive for the coronavirus.

Unlike the rest of the playing group, those in lockdown weren't allowed outside to practice for up to five hours a day.

The Grampians Trophy had a delayed start for that reason, and was mainly open to the players who hadn't been able to practice while in quarantine.

No. 12 Belinda Bencic is now the highest-ranked player in the draw, which also includes Victoria Azarenka, Angelique Kerber and Sloane Stephens.