There are enough players of sufficient quality in the Brazil squad to ensure Neymar's absence is not sorely felt, according to Marcelo.
Dunga's men suffered defeat in their opening match of the World Cup qualification process, going down 2-0 to reigning Copa America champions Chile.
Neymar was absent for Brazil - who have also had Marcelo Grohe and David Luiz withdraw from the squad through injury - due to a suspension which also rules him out of Tuesday's clash with Venezuela.
"Neymar helps a lot, of course we miss him, but there are others who can play in his place and help the team," Marcelo said in a press conference.
"I do not know what happens. We go to every game as if it were a final. We always want to win, whether it's a friendly or not," he added.
"Of course, we will see what went wrong and go over it. We have a great desire to give joy to the Brazilian public.
"I do not think it's something psychological because of what happened at the World Cup.
"We do not have much time to work in the national team, but it's no excuse."
"I cannot say if they are going to stop supporting us. When we arrived in Fortaleza, everyone received us well," Marcelo said.
"The atmosphere is great and we will do everything to win.
"We are not concerned with the boos or applause - we have to do our job and win. The crowd is with us, they want to see Brazil win."
