"At the moment it's a tough time and we have to stay together," the Austrian defender said after the 3-0 defeat against Aston Villa at the weekend.
"We have to face it, it's going to be tough this season. We can't hide from the threat of relegation.
"Our goal has always been to be in the top half of the table, but if you look at the way we're playing at the moment, you have to say it will be an achievement if we stay up this season.
"Everyone has to look at that and the supporters have to stay behind us. It will be tough if they turn on us. Everyone can see it will be a hard season for us this year."