Fischer competed in a breaststroke double at the 2000 Summer Olympics in Sydney. She achieved a FINA A-standard of 2:30.17 (200 m breaststroke) from the European Championships in Helsinki, Finland. On the second day of the Games, Fischer placed twenty-fourth in the 100 m breaststroke. Swimming in heat three, she held off a challenge from Colombia's Isabel Ceballos on the final stretch to a top finish in 1:11.58, almost half a second (0.50) closer to her entry standard. Three days later, in the 200 m breaststroke, Fischer established an Austrian record of 2:30.05 from heat four in the prelims, but missed the semifinals by six-tenths of a second (0.60) with a nineteenth-place effort.