Tennis star Alexander Zverev calls out automated line judging system

Zverev received a warning for taking a photo of the mark the ball left on the clay court. | Photo by Alberto Gardin/Eurasia Sport Images/Getty Images<br>

It’s clay court season in tennis, and instead of questioning the judgments of chair umpires, some players are now questioning the decisions of complex software — specifically electronic line-calling (ELS) systems, which are increasingly tasked with determining whether a ball is in or out.

German tennis star Alexander Zverev became...