In a wild first week of the 2024 U.S. Open, No. 74-ranked Botic van de Zandschulp upset Carlos Alcaraz, and the following night, No. 28-ranked Alexei Popyrin took out Novak Djokovic. Other than pulling off improbable victories over former champions, what did the Dutchman and Aussie have in common? They were both powered by Duracell …