 Kọ itẹsiwaju fun paragirafi yii - Nikishyn gba ami ẹyẹ idẹ ninu idije ẹgbẹ awọn ọkunrin ti épée ni 2006 World Fencing Championships ni Turin, Italy, ami ẹyẹ fadaka ninu idije ẹgbẹ awọn ọkunrin ti épée ni 2013 World Fencing Championships ni Budapest, Hungary, ami ẹyẹ goolu ninu idije ẹgbẹ awọn ọkunrin ti épée ni 2015 World Fencing Championships ni Moscow, Russia, ami ẹyẹ idẹ ninu idije kọọkan awọn ọkunrin ti épée ni 2018 World Fencing Championships ni Wuxi, China, ati ami ẹyẹ fadaka ninu idije ẹgbẹ awọn ọkunrin ni 2019 World Fencing Championships : ìlú Budapest, lórílẹ-èdè Hungary. 