Zverev serves 🎾
Called out 🚨
Umpire confirms call 👆
Zverev argues 😠
Djokovic overrules umpire 👏

Great sportsmanship @DjokerNole 👌 #RG19 pic.twitter.com/tXv5dAecsA

— Eurosport UK (@Eurosport_UK) June 6, 2019