And it was the latter pair who combined for the opening goal after 11 minutes: Costa getting the better of Antonee Robinson down the right flank before the Juventus man set up an easy chance for Firmino.
Neymar was on target in Friday night's game against the United States of America as he scored from the penalty spot just before half-time after Liverpool forward Firmino had given Brazil the lead. I suffered lots of fouls during the World Cup.
Just 32,469 attended the match at MetLife Stadium, a possible site of the 2026 World Cup final, and Brazilian supporters vastly outnumbered American fans.
The right-back then turned to the referee and asked "did you watch the World Cup?". When Brazil beat the US 2-0 at Metlife Stadium in August 2010 shortly after the venue opened, the game drew 77,223.
Although the award looked generous, Neymar made no mistake, sending the goalkeeper the wrong way to make it 2-0. Neymar's goal was his 58th in 91 appearances for his country.
In the first-half, Neymar threw himself to the ground a little too easily for DeAndre Yedlin's liking.
Neymar's diving and play acting caused huge controversy in Russian Federation last summer, as the Brazil forward was accused of deliberately trying to get opponents sent off and conning the officials.
However, earlier this week, Neymar insisted that he's making an effort not to be so theatric in the future.
As one small example of Brazil's strength and range of options (see team below), Everton's £40m+ signing Richarlison made his first worldwide appearance last night.