The final between Jannik Sinner and Carlos Alcaraz, which Sinner won 4-6, 6-4, 6-4, 6-4, drew an average of 2.9 million viewers on ESPN, the network announced Wednesday.

Defending champions Jannik Sinner and Aryna Sabalenka, who both top the tennis rankings, led 10 former winners of the U.S. Open who were on the entry lists for this year’s tournament that were announ...