Keely Hodgkinson has withdrawn from the women's 800 metres at Thursday's Diamond League meeting in Zurich, citing a physical concern.
Hodgkinson said her "body is not quite ready" for competition, prompting her decision to step out of the event at the Zurich meeting. The announcement came in the lead-up to the scheduled race.
No additional information was provided about the nature of the issue or a timetable for her return to competition. Organisers will proceed with the event without her in the field.
The Zurich meeting is one of the stops on the Diamond League circuit, which features a series of high-profile track and field competitions across the season. Hodgkinson's withdrawal reduces the starters in the women's 800m and alters the line-up for Thursday's race.