Buuxi weedha soo socota: Xilli ciyaareedkii 2000/01, Vassileva waxaa loogu magac daray kooxda Bulgaria ee tartanka 2001 European Championships ee Bratislava, Slovakia. Waxay gashay kaalinta 18-aad ee gaaban iyo 15-aad ee bilaashka ah, taasoo keentay in ugu dambeyntii la dhigo 16-aad. Waxyaabaha
2001 Koobka Adduunka ee Junior ayaa lagu qabtay magaalada Sofia, Bulgaria. Sidii sanadkii hore, Vassileva waxay ku dhameysatay kaalinta 19-aad guud ahaan, ka dib markii ay gashay kaalinta 25-aad ee barnaamijka gaaban iyo 16-aad ee bilaashka ah. Markii ay soo gabagabeysay xilli ciyaareedkeeda, waxay ka gudubtay wareegga isreebreebka ee 2001 World Championship ee Vancouver, British Columbia, Canada, laakiin waa la tirtiray ka dib markii ay gashay kaalinta 27aad ee barnaamijka gaaban.