After losing their opening game to Mexico, Dunga's side bounced thanks to the Real Madrid star, but only made sure of the points late in the game.

The Brazilians took the lead after 35 minutes when Miguel Riffo was adjudged to have fouled Robinho in the box and the striker despatched the resulting penalty past Claudio Bravo despite the goalkeeper's best efforts.

The 52,000-capacity stadium, built in less than one year, was ruled fit to stage the games even though it was clearly not ready.

The area around the arena was a sea of mud strewn with building materials and piles of debris. Inside, dust covered the seats and more debris was piled into corners.

Despite the result, Brazil were far from convincing for most of the game and spared by poor Chilean finishing in the second half.

Brazil struggled to find a way through Chile's packed defence early on and Robinho, apart from a couple of trademark stepovers, saw little of the ball.

Chile wasted opportunities to equalise and were not helped by the fact coach Nelson Acosta was forced to replace injured duo Rodrigo Melendez and Riffo, while Brazil midfielder Elano was also forced out of the contest.

However, Brazil wrapped up the game on 83 minutes when Vagner Love fed Robinho and the 23-year-old clinically beat Bravo.

Four minutes later, Robinho eluded three Chile defenders to complete his treble and draw level with Paraguay's Roque Santa Cruz as the tournament's top-scorer.

Both sides finish their Group B campaigns on Wednesday in Puerto La Cruz as Brazil meet Ecuador and Chile play Mexico.

Nery Castillo and Omar Bravo were on target as Mexico qualified for the quarterfinals of the Copa America thanks to a 2-1 win over Ecuador.

After opening their Group B account with an unexpected 2-0 victory over Brazil, Hugo Sanchez's side proved too strong for the Ecuadorians and booked their place in the last eight.

Castillo took advantage of some ordinary defending to open the scoring after 21 minutes with his second of the tournament.

Ecuador went in search of an equaliser but found it hard to break down a determined Mexican rearguard despite controlling the majority of possession.

And they paid the price 10 minutes from time as a swift Mexico counter-attack saw substitute Cuauhtemoc Blanco cross for Bravo to plant a header past goalkeeper Cristian Mora.

Ecuador ensured a nervy final five minutes for Hugo Sanchez's side as a long-range strike by Edison Mendez reduced the deficit but they could not conjure an equaliser.

The result was the second defeat of the tournament for Luis Fernando Suarez's men but they can still make the quarterfinals if they defeat Brazil on Wednesday in Puerto La Cruz.