Megan Rapinoe has emerged as one of the biggest stars of the Women's World Cup.
The United States star has bagged five goals so far in the competition and also made headlines for her feud with president Donald Trump.
But she was a notable omission from the starting line-up for Tuesday's semi-final clash against England.
She was named on the bench but did not even feature in the warm-up, sparking concerns she would not feature at all.
The only confirmation US Soccer would provide was that she was not ruled out due to disciplinary reasons.
She was spotted in training the previous day with tape on her right hamstring, suggesting a possible injury, which their governing body would not confirm.
Interestingly, they confirmed when players Becky Sauerbrunn and Julie Ertz were sidelined due to injury concerns earlier in the competition but did not give a reason for Rapinoe's omission.
There was speculation she was missing due to a tactical switch, allowing her replacement to track and limit the effect of England's attacking full-back Lucy Bronze and feared winger Nikita Parris.
Bronze's brother even suggested on social media Rapinoe was "scared" of his sister.
Her lack of involvement in the warm-up suggested the change was not tactical and there was another issue with an injury concern seeming the most likely theory despite no confirmation.
The 157-cap attacker has become a crucial member of the feared US side, and any injury clouds hanging over her would represent a major blow should they defeat Phil Neville's side to reach the final.
But her replacement, Christen Press, opened the scoring after less than 10 minutes with a bullet header.
