Mezue ahịrịokwu na-esonụ: N'ụbọchị nke anọ nke asọmpi, Wenezde, June 16, 2021, Dressel nọ n'ọkwa nke ise n'ime ọkụ niile nke prelims na 100 mita freestyle na-egwu mmiri na 48.25 ma na-aga n'ihu na semifinals. Na ọkara ikpeazu na mgbede nke otu ụbọchị ahụ, Dressel nọ n'ọnọdụ mbụ na oge 47.77 wee gafere na ikpeazu. N'ụbọchị nke ise, June 17, 2021, Dressel meriri na 100 m freestyle na oge nke 47.39 ma kwado ya maka ndị otu US Olympic Swimming na
100 m freestyle na 4×100 m freestyle relay maka 2020 Summer Olympics. O jikọtara ihe ndekọ US Open na ihe ndekọ Championship maka 100 mita freestyle na igwu mmiri ya. Nke a bụ nke ugboro abụọ Dressel ruru eru ịsọ mpi n'egwuregwu Olimpik.