Philipp Treu: Who is the Freiburg full-back whose name is in conversation for the Germany national team?

Freiburg full-back Philipp Treu earned a video call from Germany national team coach Jürgen Klopp after the superb start for him and his team to 2026/27. But what more is there to know about the talent who has a past at RB Leipzig and St. Pauli?