The 20-year-old believes his performances at the Olympic Games prove that he is worthy of the fabled shirt, and is hoping to make an impact at full international level
The youngster completed a switch from Internacional to Stamford Bridge this summer, and is currently representing his country at the Olympic Games, with Brazil set to contest the final against Mexico.
He has already made six appearances for the Selecao at full international level, and is hoping that he can see off competition from the likes of Ganso to claim the famous shirt.
"I know that I've been helping the team quite a lot," he told Fifa.com, reflecting on his performances at the Games.
"I need to put in some high-level performances in friendlies. And I think that I've proved that I've got the ability to become the No.10 for the senior Selecao too."
Oscar played a key role for Brazil as Ney Franco's side won the Under-20 World Cup in 2011, scoring a hat-trick in the final, but wore the No.11 shirt during that tournament in Colombia.
He has also been given the No.11 shirt at Chelsea, with Juan Mata currently occupying the No.10 for the Premier League club.