Stefan Kiessling is a striker who has put in very good performances in the Bundesliga over the years.
Mesut Ozil, a Mario Gotze, a Mats Hummels, a Holger Badstuber, and so on - they are very mature even in their younger years.
If a player has good technique and a good basic speed, but is slow in the head, this may reduce his value to the team.
I am coach of the Germany national team and there are not many jobs in the world which are better than this.
From my point of view, it is not the coach who becomes world champion, it is a team. Not just the players who played, but the whole squad, and also the team behind the team. Because if you want to achieve success, the whole team has to work perfectly, like a machine, and all the pieces of the puzzle need to fit together into one picture.
You cannot let him out of your sight, literally. You've always got to ask: 'what's Ronaldo doing, where is Ronaldo?'
If you become world champions, there is nothing to top that. It's the result of many years of work, good decisions inside the association, good training and good players.
I don't think we should compare club teams with international teams because they are different cups of tea.
If you have a good product, like football, you should also think about limiting it to keep the quality high.