Germany midfielder Toni Kroos believes that Scotland's aggression will be difficult to deal with when the teams meet on Monday evening.
The teams meet with Germany top of Group D, while Scotland are five points behind in fourth.
"It is always difficult going to Glasgow because Scotland won't try to play so much football. But they will be aggressive and will make things as hard as possible for us," Kroos told reporters.
"It was also hard game for us against Poland, but we knew it was going to be like that and we played well. I think it was a good match to watch."
A Germany win will see them secure qualification to Euro 2016, providing that Republic of Ireland lose to Georgia.