Brazil topped their Copa America group with a crushing 5-0 win over Peru in Sau Paulo on Saturday.
Casemiro, Roberto Firmino, Everton, Dani Alves and Willian scored for Brazil and ensured a quarterfinal clash potentially against rivals Argentina.
Peru was already down 1-0, but goalkeeper Pedro Gallese committed the dreadful mistake that led to Firmino's goal, causing a big blow for the Peruvians.
Darwin Machis scored a brace as Venezuela beat Bolivia 3-1 in Belo Horizonte and leapfrogged Peru into second place, securing a quarterfinal at Rio de Janeiro's iconic Maracana stadium.
Peru, now third in the group table, must now wait to see if they will qualify for the knock-out rounds as one of the two best third-place finishers.
The goalkeeper dallied over a clearance and when he tried to hoof the ball upfield, it cannoned off a jumping Firmino, looped over his head and again came back off the post.
The ball bounced back to Firmino who waltzed around the stranded Gallese and slotted the ball into the empty net on 19 minutes.
Peru had barely been in the game but captain Paolo Guerrero did curl a free-kick over the top.
Everton cut in off the left flank and fired a snap effort into the bottom corner, with Gallese a touch slow to react and beaten at his near post.
Alves was next in on the scoring act after playing a pair of one-twos with Arthur and Firmino before firing across Gallese on 53 minutes.
Willian sealed the rout in the last minute with a stunning strike from the corner of the 18-yard box.
(With inputs from agencies)
