Dee ihe na-esote paragraf a - N'ụtụtụ ụbọchị asaa, Dressel gbara ọsọ 21.29 na prelims nke 50 mita freestyle, were nke mbụ, mebie ihe ndekọ nke Championship, ma banye na ọkara ikpeazụ. N'uhuruchi nke ụbọchị nke asaa, Dressel gbagara asọmpi ngwụcha nke ịgba ọsọ n'ebe dị otu narị mita n'ogologo na n'ebe dị otu narị mita n'obosara nakwa asọmpi ọkara ngwụcha nke ịgba ọsọ otu narị mita n'ogologo. Na ngwụcha nke 100 mita butterfly, Dressel gbara ọsọ 49.87, na-emeri ngwụcha na igwu mmiri n'okpuru 50 sekọnd maka oge nke ise. Otú o si agba mmiri mere ka o ruo eruo ịnọchite anya United States n'ọsọ 100 mita butterfly
na 2020 Summer Olympics. Na ọkara ikpe-azụ nke 50 mita freestyle, Dressel dere 21.51, na-aga n'ihu dị ka mkpụrụ kachasị ọsọ na njedebe.