The mixed 4 × 400 metres relay event at the 2020 Summer Olympics took place on 30 and 31 July 2021 at the Japan National Stadium.

[3] After finishing first and second in their heat, the USA and Dominican Republic teams were initially disqualified for an alleged baton-changeover violation.

[4][5] In the final, the Netherlands' Liemarvin Bonevacia took the lead going in to the first handoff, with Karol Zalewski (Poland), Trevor Stewart (USA) and Dylan Borlée (Belgium) in contention.

Kendall Ellis powered through the fourth turn passing Poland's Natalia Kaczmarek and Klaver chasing after Paulino.

Netherlands went with their star 400 hurdler Femke Bol, along with Justyna Święty-Ersetic for Poland and Kaylin Whitney for USA separating as a 3-person pack in chase of Medina.

Bol almost made it, pulling the pack to just behind Medina at the handoff, the teams leaving the zone with Alexander Ogando (DOM), Ramsey Angela (NED), Kajetan Duszyński (POL) and Vernon Norwood (USA) in a row.

Unable to catch Duszyński, Norwood relaxed and glided across the line, but Ogando continued to chase and won silver for the Dominican Republic.