Johanna Konta has withdrawn from the Ostrava Open because she is not comfortable travelling for it while Covid-19 cases are on the rise in the eastern European nation.
The 29-year-old will not play again this year as she looks ahead to the 2021 season and the Australian Open in January.
The world number 13 seed was knocked out by Coco Gauff in the French Open first round last month in straight sets.
Sabalenka outguns Azarenka to win inaugural Ostrava Open
It took Gauff an hour and 41 minutes to beat the 2019 French Open semi-finalist, with Konta unable to trouble the American.
Highlights: Gauff beats Konta comfortably in impressive display
Sabalenka launches remarkable comeback after trailing 6-0, 4-0
Pliskova, Gauff crash out in Ostrava