Football Australia announced Kerr's injury moments after submitting their official teamsheet for the opening game of their tournament against the Republic of Ireland on Thursday, saying Kerr suffered a calf injury during the team's final training session. She will be unavailable for the Ireland clash, as well as their second Group B match against Nigeria on July 27.
"Unfortunately I sustained a calf injury yesterday in training," Kerr wrote on Instagram before the Ireland match.
"I wanted to share this with everyone so there is no distraction from us doing what we came here to achieve.
"Of course, I would have loved to have been out there tonight but I can't wait to be a part of this amazing journey which starts now."