Nishioka took the ball early and tried to go for his shots, but Djokovic never let him find his rhythm, and the top seed’s court-coverage often left him swinging wildly and racking up unforced errors.
By the time he finally earned his first break of the Djokovic serve, he was already down a set and 5-0; his downcast body language said everything that Djokovic needed to know about his self-belief.
Djokovic snuffed out even that bit of hope and did so in the most frustrating way, feathering a drop shot winner that floated over the net just so, earning a break point. When Nishioka employed his own drop shot in response, he ended up burying it into the net to hand the Serbian the second set.
From there, it was one-way traffic for the defending champion, who reeled off the next six games and brushed off the only break point he faced as he booked a place in the second round, where he faces Alex Molcan or Federico Coria.