Maxwell says Barcelona will use their clash with Athletic Bilbao to shake off their form blip.
The Arsenal Champions League reverse followed a draw with Sporting Gijon.
Maxwell said: "We always want to win, and this period of the season is essential. We have to focus and forget everything that has happened. We will not change the way they play, even after a loss, we continue with the same humility and remain confident in ourselves and intend to continue in all competitions.
"We must see our mistakes and make things better. We have the opportunity every three days to respond and we will try on Sunday against Bilbao. It is a very important game that we must win. We have league games to win before the second leg against Arsenal."
