Vinicius Junior apologised to Brazil's supporters following their defeat to Paraguay, acknowledging "it is a difficult time" for the Selecao.
The five-time world champions were beaten 1-0 in Asuncion, with Diego Gomez's 20th-minute strike condemning them to a fourth defeat in five qualifying games.
Dorival Junior's side occupy fifth place in the CONMEBOL section - in which the top six nations automatically qualify for the 2026 World Cup, with the team finishing seventh entering the Inter-confederation play-offs.
Already eight points adrift of leaders Argentina, Brazil are now just one ahead of eighth-place Bolivia, and Vinicius knows he and his team-mates must do better.
"We apologise to the fans, who are always on our side," the Real Madrid forward told Sportv. "But this is a difficult time, we just want to improve.
"I know my potential, I know what I can do for the national team. Of course, it's been a very difficult process, because when you don't have confidence, you don't get goals, you don't get assists and good performances.
"We know the situation we're in, we want to get Brazil out of this situation at any cost, we all have to go home now and start thinking about what we can do to get back to playing well.
"We cannot come here, lose these points and play the way we did. It is a difficult time, we must take on board all the criticism and return as quickly as possible to put Brazil on top."
Meanwhile, Marquinhos believes Brazil are going through a transitional period, and that they are not brimming with belief as a result.
"The coach is still figuring out the best way for us to play and that's reflected in the result," the defender told Brazilian TV Globo. "There are a lot of new players, we are lacking confidence.
"Qualifying isn't easy, it's a difficult time, and we have to know how to manage it. It's a time of transition, we're not feeling confident. We're going to work hard, getting results on the pitch is the best answer."