Ku qor sii wadida faqradan - At ICF Canoe Sprint World Championships, Opalev wuxuu ku guuleystay 20 billadood intii u dhaxeysay 1997 iyo 2007. Tan waxaa ku jira kow iyo toban dahab ah (C-1 200 m: 1999, 2002, 2003; C-1 500 m: 1998, 1999, 2001
, 2002, 2006; C-1 1000 m: 1999, C-4 200 m: 2002, 2005), lix dahab ah (C-1 200 m: 2001, 2005, 2007; C-1 500 m: 2003, C-1 1000 m: 2002, C-4 1000 m: 1997), iyo saddex naxaas ah (C-1 500 m: 2005, C-1 1000 m: 2003, C-4 200 m: 2001). Opalev wuxuu sidoo kale ku guuleystey laba billadood oo kale tartankii adduunka ee 2003 ee Gainesville, Georgia, Mareykanka oo dahab ah oo ka dhacay dhacdooyinka C-4 200 m iyo C-4 500 m, laakiin waxaa laga saaray billadooyinkaas markii saaxiibkiis Sergey Ulegin uu ku guuldareystay baaritaanka doping.