The knockout stage for the 2020 Thomas Cup in Aarhus, Denmark began on 15 October 2021 with the quarter-finals and ended on 17 October with the final.
The top two placed teams from each of the four groups qualified for this stage.
<onlyinclude> The draw was conducted on 14 October 2021 after the last match of the group stage. <section begin=bracket /> <section end=bracket /></onlyinclude>