Argentina’s Lanzini tears right knee ligament, out of WCup
Lanzini was injured while the team trained in Barcelona, Spain, before heading to Russia for the tournament.
Team doctor Daniel Martinez said they would announce soon when and where Lanzini will undergo the operation to repair his anterior cruciate ligament.
Argentina opens its World Cup campaign in eight days against Iceland in Moscow.
The 25-year-old Lanzini, who plays for English club West Ham, was expected to be a starter for coach Jorge Sampaoli.