The Barcelona forward's brace leaves him top of the scoring charts at the competition with four, and the 22-year-old was delighted with La Selecao's overall showing against the Indomitable Lions.
He told reporters: "It was our best match not only by the end result but by the way we played on the pitch. We are on the right track. We are progressing.
"Everybody is at the same level and football is becoming harder and harder. We are going to face a very strong opponent in the next match."
Brazil eventually topped Group A, with Mexico qualifying for the last 16 alongside Luiz Felipe Scolari's side.