"I'm going to keep the World Championship in my sights, stay optimistic, and keep fighting," wrote the 31-year-old on Facebook on Thursday ahead of his journey home from Rio.
"Ich behalte weiter die WM im Blick, bleibe zuversichtlich und kämpfe weiter", schrieb der 31-Jährige am Donnerstag vor seiner Abreise aus Rio de Janeiro bei Facebook.