Career
Foreign the Russian ice hockey player, see Dennis Sergeyev. European Amateur Championships 2008
Sergeev represented Russia at the 2008 European Amateur Boxing Championships in Liverpool, England. 2008 (as a Super heavyweight)
Preliminary round Defeated Andrew Wyn Jones (Wales) RSC4
Quarter Finals Defeated Mikhaili Sheibak (Belarus) 7-2
Semi Finals Defeated Memnun Hadzic (Bosnia) RTD3
Finals Lost to Kubrat Pulev (Bulgaria) 9-2
2009
At the 2009 World Amateur Boxing Championships he lost to Viktar Zuyev and dindnt medal.