The Arsenal striker is in the squad to face Brazil in a friendly at Wembley on Wednesday.
The 23-year-old said: “We believe in ourselves and the manager believes in us as well.
“The team is the best I’ve been part of.”
He added: “The players I am training with are absolute world-class players. It is a very good squad.
“It is a young squad that is eager to do well and we have a great manager and great staff.”