Jonathan Klinsmann remembers being thrilled, if a little uneasy, when Hertha Berlin coach Pal Dardai tapped him on the shoulder and told him he would be playing his first professional game at Olympic Stadium.
So he called his dad, Jurgen, who played in that stadium, coached in that stadium and won a World Cup with the German national team, for advice in calming his nerves
"It was a couple of days before the game and you start thinking, and start overthinking," the younger Klinsmann remembered. "I didn't know what to think. So I called my dad. After that I was good, I was fine.