Dee ihe na-aga n'ihu maka paragraf a - Na 2004 Summer Olympics na Athens, Tregubova ruru eru ọzọ maka 50 m freestyle
site n'ime ka FINA B-cut nke 26.90 site na Russian Open Championship na Moscow. Na-egwu mmiri n'otu okpomọkụ ahụ dị ka Sydney, ọ buliri ebe nke abụọ karịa Roshendra Vrolijk nke Aruba site na 0.03 nke abụọ, n'èzí oge ntinye ya nke 28.40. Tregubova enweghị ike ịga n'ihu na ọkara ikpeazu, ebe o tinyere iri anọ na asatọ n'ime ndị na-egwu mmiri 75 n'ụbọchị ikpeazụ nke mmeghe.