Denis Sergeyevich Sergeev or Denis Sergeyevich Sergeyev (Денис Сергеевич Сергеев; born March 21, 1982, in Vladimir Oblast, Russia) is a Russian amateur boxer who won the silver medal at the 2008 European Amateur Boxing Championships in the super heavyweight division.

[1] In November 2007, Sergeev won the "Good Luck Beijing" International Boxing Tournament at the Beijing Workers' Indoor Arena, China, beating Michael Hunter of the USA 21-18 in the final.

[2][3] Sergeev represented Russia at the 2008 European Amateur Boxing Championships in Liverpool, England.

He won a silver medal after being defeated in the final 9:2 by Bulgarian Kubrat Pulev.

[4] 2008 (as a Super heavyweight) At the 2009 World Amateur Boxing Championships he lost to Viktar Zuyev and didn't medal.