Emma Raducanu retired from her second-round ASB Classic match in tears after injuring her ankle just 11 days before the start of the Australian Open.
She received medical attention before the start of the third set but signalled her withdrawal two points into her opening service game.
The former US Open champion had an injury-blighted 2022 season.
Having retired from five matches last year, Raducanu said she was injury free and feeling "good" following an exhibition match in December.
She began 2023 with victory over teenager Linda Fruhvirtova in her opening match in Auckland in preparation for the season's first major tournament in Melbourne.