Mezue ahịrịokwu na-esonụ: Na ICF Canoe Sprint World Championships, Opalev enwetala ihe nrite 20 n'etiti 1997 na 2007. Nke a gụnyere ọlaedo iri na otu (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), ọlaọcha isii (C-1 200 m: 2001, 2005, 2007; C-1 500 m: 2003, C-1 1000 m: 2002, C-4 1000 m: 1997), na ọla nchara atọ (C-1 500 m: 2005, C-1 1000 m: 2003, C-4 200 m: 2001). Opalev meriri ihe nrite abụọ ọzọ na asọmpi egwuregwu ụwa nke 2003 na Gainesville, Georgia, United States na ọla edo na C-4 200 m na C-4 500 m ihe omume, mana ewepụrụ ya ihe nrite ndị ahụ mgbe onye otu ya Sergey Ulegin dara ule doping.