Kọ itẹsiwaju fun paragirafi yii - Ni ICF Canoe Sprint World Championships, Opalev ti gba ami ẹyẹ 20 laarin ọdun 1997 ati 2007. Eyi pẹlu awọn wura mọkanla (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), mẹ́fà fàdákà (C-1 200 m: 2001, 2005, 2007; C-1 500 m: 2003, C-1 1000 m: 2002, C-4 1000 m: 1997), àti mẹ́ta idẹ (C-1 500 m: 2005, C-1 1000 m: 2003, C-4 200 m: 2001). Opalev tun gba awọn ami ẹyẹ meji diẹ sii ni awọn aṣaju-aye 2003 ni Gainesville, Georgia, Amẹrika pẹlu wura ni awọn iṣẹlẹ C-4 200 m ati C-4 500 m, ṣugbọn wọn yọ awọn ami ẹyẹ wọnyẹn kuro nigbati ẹlẹgbẹ ẹgbẹ Sergey Ulegin kuna idanwo dopin kan.