Alicia Sacramone not included in the U.S. Women’s Lineup after injuring her right Achilles

Alicia Sacramone was not included in the U.S. women’s lineup for qualifying at the world gymnastics championships after injuring her right Achilles’ tendon during training Thursday.

The Beijing Olympic captain had tests at a local hospital, and was waiting for a doctor back in the United States to evaluate them. The worlds begin Friday with women’s qualifying, and the U.S. women compete Saturday.

Alicia Sacramone injury occurred as she was beginning a tumbling pass on floor. Losing her is a huge blow for the Americans, who prize the 23-year-old veteran as much for her leadership as her big scores on vault, where she’s the defending world champion, balance beam and floor exercise.

The American artistic gymnast was one of only two Americans who’d competed at the worlds before—Aly Raisman was on last year’s silver medal squad—and she considered keeping the rookies calm and focused as important as anything she did on the floor.

In team finals, only three gymnasts compete on each event, but all three scores count.

Because Alicia Sacramone is still on the U.S. squad, she would receive a medal if the Americans win one. She currently has nine world medals, equal with Shannon Miller and Nastia Liukin for most by an American.