U.S. Open mixed doubles: Serena Williams and Carlos Alcaraz steal show in defeat as singles stars triumph

NEW YORK — After five-and-a-half hours of opening acts, the main event of the first day of the U.S.Open got underway when Serena Williams and Carlos Alcaraz walked onto the court at Arthur Ashe Stadium. There was just a bit of noise. The sort of noise that only rises through stad