Mezue nkebi ahịrịokwu a: N'egwuregwu Olimpik nke afọ 2000 e mere na Sydney, Sitnikov gbara ọsọ naanị n'asọmpi igwu mmiri abụọ. O kpuchiri FINA B-cut nke 51.69 (100 m freestyle) site na Kazakhstan Open Championship na Almaty. N'ụbọchị mbụ nke Egwuregwu, Sitnikov tinyere iri abụọ na otu maka ndị otu Kazakhstan na 4 × 100 m freestyle relay. Na-arụkọ ọrụ na Sergey Borisenko, Pavel Sidorov, na Andrey Kvassov na okpomọkụ nke atọ, Sitnikov gbagoro ụkwụ na-eduga ma dekọọ nkewa nke 52.56, mana ndị Kazakhs kwụsịrị naanị n'ọnọdụ ikpeazụ na oge ikpeazụ nke 3:28.90. Ụbọchị atọ mgbe e mesịrị, na
Na 100 m freestyle, Sitnikov tinyere iri ise na atọ na ụtụtụ prelims. Na-egwu mmiri na okpomọkụ ise, ọ gbara ọsọ gaa na nke ise site na 0.15 sekọnd n'ihu Wu Nien-pin nke Chinese Taipei na 52.57.