Djokovic given scare by world number 110

The defending champion lost the first set and was then taken to a second-set tie-break as tensions rose. But qualifier Zverev’s composure cracked as the 12-time Grand Slam-winner reeled off the first four points of the tie-break and raced through the deciding set to win 3-6, 7-6 (7/4), 6-3. As Zverev became increasingly dispirited, Djokovic was a picture of calm as he hummed to himself during the deciding set to keep his mind off his mistakes. “Instead of the occasional tantrum that I used to have, I hope it’s behind me, so I would switch that vibration and transform it into a tune,” said the world number one.