Gremio midfielder Walace insists he is ready to replace Casemiro in the Brazil team for their match against Peru on Sunday.
The Real Madrid star is suspended for the final Copa America Centenario Group B game after bookings in previous fixtures against Ecuador and Haiti.
"[Head coach] Dunga has not spoken to me," he said. "But if he chooses me, I will try to do my best.
"Each player has his own style - Casemiro has it. If I am chosen, I will try to do better."
"I was eager to play, but this is normal for any player who comes on for the first time," he said.
"It took a little time to adapt, but I was fine. Today, I am a little more comfortable and hope to have a little more opportunity.
"I am calm - I have passed the stage of having butterflies in my stomach."
"I faced Guerrero in Corinthians and Flamengo," he added.
"He is a very smart player, we cannot give him much space. He has a good first touch
"He is one of the players we have to worry about."
