Complex sentence: He debuted on 23 July 2014, in a friendly 5--2 win against Wacker Innsbruck, while his Bundesliga debut came a month later against Hertha BSC.
Split into simpler sentences: He debuted on 23 July 2014, in a friendly 5--2 win against Wacker Innsbruck. His Bundesliga debut came a month later against Hertha BSC.