Fischer's mother, Sarina Hülsenbeck-Fischer, won a gold medal in women's swimming at the 1980 Summer Olympics in Moscow, earning it in the 4 x 100 m freestyle relay (anchor leg).
Fischer's wife, Sarina, won a gold medal in women's swimming at the 1980 Summer Olympics in Moscow in the 4 x 100 m freestyle relay (anchor leg) and competed in the qualifying round of the 4 x 100 m medley relay.