Vinicius Junior's Brazil debut was an underwhelming affair but Casemiro, his Real Madrid team-mate, wants him to "think big".
Brazil lost to Peru on Tuesday, dealt their first defeat in over a year, but Fagner hoped to use the experience as a positive.
Luis Abram's 85th-minute header saw Peru past Brazil, while condemning the Selecao to their first defeat since the 2018 World Cup.
Neymar was a topic of conversation once again as Brazil prepare to face Peru in a rematch of the Copa America final.
By knocking Brazil out of the FIBA World Cup on Monday, the United States secured their Olympic qualification.
United States and Czech Republic advanced from their second-round FIBA World Cup group, while Australia edged France.
Vinicius Junior had been in line for a Brazil debut against Colombia, but Tite decided taking Neymar off would have been counterproductive.
Neymar scored and provided an assist in Brazil's draw with Colombia, and coach Tite hailed his "real relationship" with the forward.
Neymar notched a goal and an assist in his first match since June, much to the delight of Brazil team-mate Dani Alves.
Making his first appearance of the season, Neymar scored and set up Casemiro's opener in Miami on Friday.