Emma Raducanu has pulled out of next month's Billie Jean King Cup, citing a wrist injury.
The former US Open champion had been named as part of Great Britain's team for the tournament, which will take place at Emirates Arena in Glasgow between November 8-13.
Raducanu was selected alongside Harriet Dart, Katie Boulter and Heather Watson, with a fifth member to be added at a later date, and made her Billie Jean King Cup debut in April's qualifier against Czech Republic.
However, after pulling out of the Transylvania Open earlier this month with the same right-wrist issue, the 19-year-old confirmed on Friday she had been told by doctors she will not recover in time.
"It's disappointing to get the news from the doctors that I won't be ready in time, particularly with it being on home soil," Raducanu said.
"I tried to do everything possible to get it ready in time.
"Since my last tournament I've been working every day on physical training and rehab. I've got confidence in my team-mates and look forward to playing next year."
Great Britain will be one of 12 teams participating in Scotland, and have been drawn in a group with Kazakhstan and Spain.