Brazil midfielder Oscar has demanded that Brazil make an improvement defensively if they want to win the Olympic football tournament.

The Selecao beat Belarus 3-1 on Tuesday to secure a quarter-final place with a game to spare, but Oscar thinks that the whole team need to make a dramatic improvement if they want to win their first ever men's football gold.

He told reporters: "We need to improve in the air because we have conceded goals that way.

"If we improve our defending we will score more goals and we will be better."

Brazil play New Zealand on Wednesday in their final group match before progressing to the knockout stages.