"You can no longer predict how they will play. I have watched their last six games in order to prepare for Wednesday's match. They can employ so many different styles and variations," he was quoted as saying by SID.
"Germany have made the semi-finals at the Euros and the World Cup on four occasions in recent years. It's an incredible performance to make it among the best four time and time again in my opinion.
"And they still have plenty of room for improvement with their young team. For me, players are internationally ready when they have made 50 international appearances or so."
Wednesday's match is scheduled to kick off at 21:00CET.