Continuing the form that took her to the us open semifinals, Wozniacki raced through the first set before building a commanding lead in the second. However, with the finishing line in sight, Wozniacki, who lifted the title in the Japanese capital six years ago, wobbled before recomposing herself in the deciding set to close out a 6-2, 5-7, 6-1 victory.
The result ended a run of four straight defeats for Wozniacki against the Swiss and her reward is a second-round meeting with No.4 seed Suarez navarro
A strong serving display from Wozniacki, who backed up her usual metronomic groundstrokes with 10 aces, provided further reminder of her ability to contest at the business end of the WTA's flagship events. The only cause for concern came when victory was in sight.
Leading 5-2, the former World No.1 came within two points of victory only to see Bencic escape this game, then pounce on a couple of inviting second serves to break back. As the Dane retreated into her defensive shell, Bencic prowled around the court with intent, clubbing a drive volley to move 6-5 ahead before serving out to love