Arsenal have confirmed that striker Vivianne Miedema ruptured her anterior cruciate ligament during their UEFA Women’s Champions League match against Lyon at Emirates Stadium.
A statement on the club's official site read: "Viv will undergo surgery in the coming days and will unfortunately be ruled out for an extended period of time. A more detailed timescale will be established once the operation is complete.
"Everyone at Arsenal wishes Viv well in her recovery and will be providing her with all the support she needs to return to action as soon as possible."