:For the Russian ice hockey player, see Dennis Sergeyev.
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Sergeev won a bronze in the 2005 Super-heavyweight Russian senior national championships losing 29:14 to Vladislav Vasilev and won a bronze again in 2006 losing to Magomed Abdusalamov in the semi final by 49:44.
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The following year in 2007 he won the title beating European champion Islam Timurziev 22:19 in the final and followed the success up in 2008 beating Shamil Gadzhiev to win the title.
:For the Russian amateur boxer, see Denis Sergeev.
Saint-Denis | Denis Diderot | Saint-Ouen, Seine-Saint-Denis | Denis Leary | Denis | Seine-Saint-Denis | Claire Denis | Montreuil, Seine-Saint-Denis | Denis Halliday | Denis Healey | Charles Denis Bourbaki | Ruth St. Denis | Maurice Denis | Denis Thatcher | Denis Sassou Nguesso | Denis McLoughlin | Siméon Denis Poisson | Saint-Denis, Réunion | Gare d'Estrées-Saint-Denis | Denis Smith | Denis Piel | Denis Lawson | Denis Johnson | Denis Boyles | Basilica of St Denis | Villepinte, Seine-Saint-Denis | Saint Denis Street | Saint-Denis, Quebec | Saint-Denis-lès-Martel | Neil Denis |