The 29-year-old Wimbledon champion had an eventful 2020 season in which she ran up a 17-match winning streak.
The start to her 2021 campaign will involve the long journey to Australia in mid-January before two weeks in quarantine ahead of the start of the year's first Grand Slam on Feb. 8.
The ATP tournament scheduled to take place in Adelaide has been moved to Melbourne to be played in the week commencing Jan. 31 alongisde another men's tournament in the city.