Alexander Zverev's controversy at the Madrid Open raises questions about electronic line-calling technology's reliability and ...

During a clay court match in Madrid, Zverev pointed out the discrepancy between where the ball landed and Hawk-Eye’s call.

Alex Zverev was given a warning for unsportsmanlike conduct after using his phone to take a photo of a disputed ball mark in ...

Alexander Zverev battled past Alejandro Davidovich Fokina at the Madrid Masters. The former champion prevailed 2-6, 7-6, 7-6 ...