Kammala wannan jumla: Agafonov ya yi iyo a karo na biyu a cikin
100 m freestyle a Wasannin Olympics na bazara na 2004 a Athens. Ya sami matsayin FINA B na 52.10 daga Gasar Rasha a Moscow. Ya kalubalanci wasu masu iyo bakwai a zagaye na biyu, gami da Željko Panić mai shekaru 28 daga Bosnia da Herzegovina. Ya yi tsere zuwa matsayi na huɗu ta hanyar 0.17 na biyu a bayan Panic a 52.92. Agafonov ya kammala aikinsa na uku na Olympics tare da ƙoƙari na hamsin da bakwai a cikin wasan farko.