After getting checked out, Andreescu said she wouldn't be able to keep going, giving Barty, the reigning champion, the win.
In a speech afterwards, Andreescu congratulated her opponent and said it was "definitely not the way I wanted to end the tournament."
This isn't the first time an injury has stopped the 20-year-old. Back in November 2019, she had to tap out of the WTA Finals with a knee injury that, combined with the pandemic, would go on to keep her off the court for over a year.
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