The teenager will spend the next few days training with the Gunners and has admitted that he dreams of a move to European football.
He told Globo Esporte: "I'm anxious for this new stage in my life.
"I'll spend a week at Arsenal. It will be cool, I hope I enjoy it.
"Of course I have the dream of playing for a European club, but everything has its right time. It will be a good experience. I want to learn."
The Brazilian starlet is not expected to sign for Arsenal and is training with the club merely to gain experience at this stage.