Ashleigh Barty won't defend her WTA Finals crown next month in Guadalajara and has ended her season officially after making the announcement on Saturday.
Barty, the current World No.1 hasn't played since the US Open in September with her full focus now going on the Australian Open now she is back home.
Being back home is the main reason for not going to Mexico, having to undergo a strict quarantine en route home, she would have to do this again to head to the WTA Finals.
"I wanted to let everyone know that I won't be competing in any further tournaments in 2021, including the WTA Finals in Mexico," Barty said in a statement on Saturday.
"It was a difficult decision but I need to prioritise my body and my recovery from our 2021 season and focus on having the strongest pre-season for the Australian summer.
"With ongoing challenges of travelling back to Queensland and quarantine requirements, I am not willing to compromise my preparation for January.
"I wish the WTA team and the players all the best for a successful WTA Finals and the rest of the year."