As Niké Szidiropulosz, competing with Hungary, Niki-Katerina Sidiropoulou won the silver medal at the World Championships Cadets in 1991 in
Foggia, at the Epee Women's U17 Individual event. In 1992 she won the silver medal at the European Championships U20, in
Innsbruck, Austria, at the Epee Women's U20 Individual event. In 2002 she won the silver medal at the
2002 European Fencing Championships in Moscow, at the Epee Women's Senior Individual. She has been Greek Champion in both individual and team events, and won several other medals in Greek Championships, the last one in 2021. ==References==