Kammala jumla mai zuwa: A rana ta huɗu ta gasa, Laraba, 16 ga Yuni, 2021, Dressel ya kasance na 5 a cikin dukkan zafin jiki na farko a cikin ninkaya mai ninkaya mita 100 a 48.25 kuma ya ci gaba zuwa wasan kusa da na karshe. A wasan kusa da na karshe a yammacin wannan ranar, Dressel ya zama na farko da lokacin 47.77 kuma ya ci gaba zuwa wasan karshe. A rana ta biyar, 17 ga Yuni, 2021, Dressel ya lashe tseren tseren mita 100 tare da lokacin 47.39 kuma ya cancanci shi ga kungiyar 'yan wasan Olympics ta Amurka a gasar.
100 m freestyle da 4 × 100 m freestyle relay don Wasannin Olympics na bazara na 2020. Ya yi daidai da rikodin US Open da kuma gasar zakarun Turai don mita 100 na 'yanci tare da yin iyo. Wannan ya nuna wasannin Olympics na biyu da Dressel ya cancanci shiga.