Which country won the first mixed 4 × 400 metres relay in Olympic history at the Tokyo 2020 Games?

Fact

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Poland won the first mixed 4 × 400 metres relay ever contested at the Olympic Games on 31 July 2021. The event officially belonged to Tokyo 2020, which had been postponed for one year. Karol Zalewski, Natalia Kaczmarek, Justyna Święty-Ersetic and Kajetan Duszyński completed the final in 3:09.87. The Dominican Republic earned silver and the United States bronze. Mixed relay teams contain two women and two men, but their running order may vary. That freedom adds a distinctive tactical element to baton exchanges and to the changing gaps between athletes around the track.