"It won't be easy. After 10 or 12 games you will see whether the big four make a move and obviously it's very difficult to stay up there," the German said.
"Last year we had a very bad home record, and I think that's key this year - to pick up enough points and wins, get a few wins away from home.
"If we can do that we can stay in the top half. But I think we are going to have to wait until Christmas and see where we are then," he told Sky Sports.