Nyora kupfuurira kweiyi ndima - Pamakwikwi eOlympics yeZhizha ya2000 muSydney, Sitnikov akakwikwidza mumitambo miviri chete yekushambira. Akapfuura FINA B-cut ye51.69 (100 m freestyle) kubva kuKazakhstan Open Championships muAlmaty. Pazuva rekutanga reMitambo, Sitnikov akaisa makumi maviri nerimwe kuchikwata cheKazakhstan mu4 × 100 m freestyle relay. Achishandira pamwe naSergey Borisenko, Pavel Sidorov, naAndrey Kvassov mumakwikwi matatu, Sitnikov akahwina mukombe wekutungamira uye akarekodha kupatsanurwa kwe52.56, asi maKazakh vakagutsikana chete nenzvimbo yekupedzisira munguva yekupedzisira ye3:28.90. Mazuva matatu gare gare, mumakwikwi emamita 100 akasununguka
, Sitnikov akaisa makumi mashanu nenhatu pamisangano yokutanga yemangwanani. Achishambira mumakwikwi mashanu, akakwikwidza kunzvimbo yechishanu nemasekondi 0.15 pamberi peChinese Taipei's Wu Nien-pin mu52.57.