The Dutchman featured in the Reds' shock home reverse to West Brom on Saturday, but was quick to play down talk of a crisis so early in the campaign.
"I think we are not in crisis," Büttner said. "We have lost three games but we have to focus in every game and we have to fight in every game to win.
"Of course the crowd wants to see Manchester United winning, and the players as well. If we lose we aren't happy, we want to win as well and we have to fight in every game to win. This season starts now and we can win many games. You have to trust the players and everyone. I think we can do this as a team and we're going to win games, I'm sure."
The first opportunity to do so comes against Shakhtar Donetsk in Wednesday's Champions League encounter, and Büttner admits the Reds must quickly move on from the shock of the Baggies' triumph.
"Of course, it's very disappointing to lose the game, because we played a good game and won against Liverpool, now we lose at home against West Brom, so it's very disappointing for everyone," he said.
"I think we missed too many chances. They scored the chances they got and I think it was difficult for us to score because they had all eleven players behind the ball. I think it was a very difficult game today and we have to focus on Wednesday's game."