Tokyo (AFP) - Former champion Petra Kvitova stormed through her opening match at the Pan Pacific Open on Tuesday, beating American Madison Brengle 6-3, 6-3 in a flurry of swashbuckling winners.
The 26-year-old Czech, twice a Wimbledon winner, had too much firepower for Brengle in a match played under a closed roof due to typhoon rains in Tokyo.
Seventh seed Kvitova will next play Rio Olympic gold medallist Monica Puig of Puerto Rico.
"I've seen her play a few times," Cibulkova said of Osaka. "She has a powerful serve and it's always tough playing against these young players -- they are fearless and have nothing to lose."
In other matches, Denmark's former world number one Caroline Wozniacki battled to a 6-2, 5-7, 6-1 victory over Switzerland's Belinda Bencic.
Elsewhere on a day badly affected by the weather, Latvia's Anastasija Sevastova beat Ukrainian Kateryna Bondarenko 7-6, 6-3 while Aliaksandra Sasnovich of Belarus overcame Belgium's Yanina Wickmayer 3-6, 6-3, 6-3.