Chile manager Reinaldo Rueda admits he's worried about Manchester United striker Alexis Sanchez.

Sanchez has only scored two goals all season for United and is now out for two months after being forced off injured in Saturday's 3-2 win over Southampton.

"For sure it's very worrying," Rueda said of Sanchez's form to La Tercera newspaper. "These are situations that happen in football.

"We hope he overcomes this very quickly because he has all the quality, a track record, experience and quality to assert himself.

"I hope we can enjoy the Alexis we all knew again."