Kammala jumla mai zuwa: A shekara ta 2008, ta lashe Kofin Urals na Arewa a Krasnoturinsk, Rasha, da kuma gasar cin kofin mata na sauri
Wasannin Wasannin Wasanni na Duniya na 2008 a Beijing. A cikin 2012, Stefanova ta lashe Gasar Cin Kofin Duniya ta Mata.