Pedzisa mutsara unotevera: Demchenko akahwinawo menduru sere paFIL European Luge Championships negoridhe ina (Varume vega: 2006, 2010; Chikwata chakasanganiswa: 2012, 2014), sirivheri mbiri (Varume vega:
1996, 2008), uye mbiri dzebronze (Varume vaviri vaviri: 1996; Chikwata chakasanganiswa: 2013).