Chelsea striker Sam Kerr has suffered an ACL injury while on a warm weather training camp in Morocco, the club said on Sunday.
"Sam will be assessed by a specialist in the coming days and then begin her rehabilitation with the club's medical team," Chelsea said in a statement.
Australia's football association said there is no timeframe on her return, although confirmed is expected to miss the rest of the 2023-24 Women's Super League season.
"Considering how hard Sam has worked over the past six months to return to play, this news is a devastating blow for everyone," Gustavsson said in a statement.