Chile coach Jorge Sampaoli says Arsenal winger Alexis Sanchez and Bayern Munich midfielder Arturo Vidal are doubtful for Chile's first 2018 World Cup qualifier against Brazil on Thursday.
"Neither Vidal nor Alexis are confirmed for the Brazil game," Sampaoli said.
Sanchez joined the Chile camp in Santiago despite picking up a slight groin injury during the 3-0 win over Manchester United this past weekend.
Vidal, meanwhile, only appeared as a late substitute in the 5-1 demolition of Borussia Dortmund, as he recovers from a knee injury.
Neither has yet participated in full training with the Copa America champions.