Bianca Andreescu will not play again in 2020 after confirming her intention to skip the clay-court swing.
The 2019 US Open champion has not played a competitive match since sustaining a knee injury during the WTA Finals last October.
Andreescu's agent had already confirmed her withdrawal from the French Open, with the main draw due to begin on Sunday.
And in a post on social media, Andreescu wrote: "I have come to the difficult decision to skip the clay-court swing this year and will be taking the remainder of the season off to focus on my health and my training.
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"As hard as it was to come to this conclusion, I have so much to look forward to in 2021, including the Olympics; I want to use this time to focus on my game so I can come back stronger and better than ever.
— Bianca (@Bandreescu_) September 22, 2020
"As always, all of your encouraging words and support mean the world to me and I look forward to getting back on the court and competing for Canada next year!"
Andreescu became the first Canadian to win a grand slam title when she defeated Serena Williams in the final at Flushing Meadows last year.
She remains number seven in the WTA rankings despite her elongated period of inactivity.