Cameroon defeat is a warning signal for Brazil, says Dani Alves

lost with one goal against Cameroon on Friday but finished at top of Group G with six points and will face South Korea in the last 16 round. Cameron became the first African nation to beat Brazil in the World Cup.

Brazil manager Tite made nine changes to his team for this game and the 39-year-old

was one of them who also wore the captain armband.

Alves became Brazil men's oldest World Cup player against Cameroon. After the game, Alves said Brazil players should learn from the loss and insisted they can’t afford to undermine their opponents in the knockout stage.

"It's a warning signal,"

he said

. "There is no weak rival. Here is the lesson, we need to stay switched on throughout the game. One detail and it's over.

"We end today with the feeling that a beautiful day slipped through the hands of us players who weren't playing much.”

Brazil was without Neymar, Alex Sandro, and Danilo who all are injured. Alex Telles and Gabriel Jesus both picked up injuries against Cameroon. Brazil is optimistic that Danilo will be available against South Korea but

and Alex Sandro have not returned to training.

Should Brazil get past South Korea, they will face either Croatia or Japan in the quarter-finals.

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