Arsenal and England forward Beth Mead faces a long absence that could put her participation in the women's World Cup in doubt after suffering a ruptured anterior cruciate ligament (ACL) against Manchester United at the weekend.
The tournament starts in Australia and New Zealand next July.
"Beth is set for an extended period on the sidelines," Arsenal said in a statement. "She will see a surgeon in the coming days, after which further details on timescales will be established."
Mead has scored 29 goals in 50 appearances for England, helping them win this year's European Championship as the tournament's top scorer.