Pep Guardiola says Manchester City will be treating Tuesday's Champions League clash with his former side Barcelona "like a final".
Guardiola believes the Spanish champions are beatable but thinks City will need an almost perfect display if they are to claim the three points.
A win over Luis Enrique's side would greatly enhance City's qualification chances and Guardiola said: "We will try.
"I have never thought that we can't win a football match and I never will.
"It's difficult and we know we need to play almost perfectly to win. If not, we will congratulate them and move on.
"Maybe we are going to change the way we press, our build up, control. I would like to play at a good level for 90 minutes.
"I'd like us to show courage and put everything into the game. Hopefully our quality can make the difference.
"There are just three games left. We dropped points in Glasgow [at Celtic] and we have to recover those points."
Willy Caballero will be in goal for City due to Claudio Bravo's suspension and Guardiola has faith in his back-up keeper.
City have lost all five of their Champions League matches against Barcelona and have had a man dismissed in all but one of those contests, a statistic Guardiola says needs to change.
"At that level, it's impossible to achieve your targets [with 10 men]. It's football, and football is a game of mistakes."
After going six games without a victory, the longest run in Guardiola's managerial career, City returned to winning ways on Saturday with a 4-0 win at West Brom.
And Guardiola added: "Winning the last game helped a lot but the Champions League is different.
"Tomorrow we have another chance against the best. We know them and they know us.
"I have been here three months, I was 20 years in Barcelona. I would like to do similar things but I need time."
City have injury problems at right-back, with Bacary Sagna and Pablo Zabaleta both unavailable, meaning Guardiola has to choose between Fernando, who played in that position for the first time against West Brom, and 19-year-old Pablo Maffeo.
But Sergio Aguero, who was surprisingly left out of the starting XI in Barcelona, is set to feature from the off this time after scoring twice against the Baggies.