Carlos Alcaraz defeated Dominik Koepfer at the 2023 US Open in the first round on hard court, with the match ending 6–2, 3–2 in Alcaraz's favour. As the heavy favourite at odds of 1.02, Alcaraz's victory followed expectation, with Koepfer entering at 28.61. The Spaniard's commanding performance in the opening set demonstrated the gulf in class between the seeded contender and his German opponent, though the match did not reach completion in regulation. Alcaraz's progression underscores his status as a leading threat in the Grand Slam draw.