She represented the United Team of Germany at the 1956 Summer Olympics in Melbourne, placing fourth in the long jump.

At the 1962 European Championships she won silver in the 4 × 100 m relay with the West German team and tied for bronze in the 80 m hurdles.

[2][6] At the 1956 Olympics in Melbourne she injured herself in the long jump, but still placed fourth with a wind-aided 5.89 m;[2][6] she was supposed to also compete in the 4 × 100 m relay, but had to sit out due to the injury.

[7] She won two medals at the 1962 European Championships in Belgrade, silver in the 4 × 100 m relay (44.6) and bronze in the 80 m hurdles.

[1][5] The hurdles final was extremely close, with Fisch, Teresa Ciepły, Karin Balzer and Maria Piątkowska all running 10.6;[5] eventually, judges announced that Ciepły had won and Balzer placed second, while Fisch and Piątkowska shared third place.