In the pre-season for the 2016–17 season, Feldhahn played for the first team. He played against Manchester City, A.C. Milan, Inter Milan, and Real Madrid. Carlo Ancelotti put Feldhahn on the bench for the 2016 German Super Cup against Borussia Dortmund and the first round of the German Cup against Carl Zeiss Jena. Feldhahn didn't come into either match. During his time with the first team, he had also played for the reserve team. Bayern put Feldhahn in their UEFA Champions League squad for the 2016–17 season.