Complex sentence: Since 2004, he was a part of the SC Freiburg academy, and celebrated his debut in the Bundesliga at seventeen years of age and he immediately won himself a place in the centre of midfield.
Split into simpler sentences: Since 2004, he was a part of the SC Freiburg academy, and celebrated his debut in the Bundesliga at seventeen years of age. He immediately won himself a place in the centre of midfield.