Muguruza comes through Bencic test

A tricky first-round test was well negotiated by Garbine Muguruza at the Tokyo Open, where Naomi Osaka will face Dominika Cibulkova.

Garbine Muguruza celebrates victory over Belinda Bencic

Garbine Muguruza avoided a first-round exit at the Tokyo Open, coming through a tough opening assignment against Belinda Bencic in straight sets.

The two-time Grand Slam champion, who went into the match 4-4 in her last eight matches since a run to the semifinals of the French Open, needed only an hour and 24 minutes to beat the Swiss 6-2, 6-4.

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But the Spaniard suggested the scoreline flattered her somewhat, saying: "It was a very difficult first round. She's a tough player with incredible wins. Today [Monday] was tough but I'm glad to win.

"I like to play here. In the past I've done well, so I'm positive this year that I can do well again and go far."

Next up for Muguruza will be either  Eugenie Bouchard  or  Alison Riske,  the world number 14 aiming to win back-to-back matches for the first time since Roland Garros.

Dominika Cibulkova will serve as US Open champion Naomi Osaka's first opponent since her triumph at Flushing Meadows after coming through a see-saw battle with Nao Hibino 6-1, 5-7, 6-3.

Camila Giorgi  saw off Misaki Doi in much more straightforward fashion, claiming a 6-2, 6-1 victory, earning the Italian a clash with top seed  Caroline Wozniacki.

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Anastasia Pavlyuchenkova  was a straight-sets winner over  Aliaksandra Sasnovich  and will face second seed Caroline Garcia next, while  Daria Gavrilova  won a third-set tie-break against Kristyna Pliskova to book a second-round clash with her sister  Karolina Pliskova  and  Anett Kontaveit  beat  Kristina Mladenovic.