Tuesday 20 September 2016 18:07, UK
Caroline Wozniacki has advanced to the second round of the Pan Pacific Open, gaining revenge over Belinda Bencic for last year's semi-final defeat.
Wozniacki continued her return to form by hitting 10 aces in the 6-2 5-7 6-1 win over Bencic to set up a second-round meeting with fourth-seeded Carla Suarez Navarro.
The 26-year-old, who reached the semi-final at the US Open with a 6-0 6-2 victory over Latvia's Anastasija Sevastova, ended a run of four straight defeats against the Swiss player Navarro.
Elsewhere Yulia Putintseva of Kazakhstan upset fifth-seeded Madison Keys of the United States 6-3 3-6 7-6 while firing down 15 aces.
Meanwhile, sixth-seeded Dominika Cibulkova of Slovakia ousted Lucie Safarova of the Czech Republic 4-6 6-1 7-5 after two-and-a-half hours.
The 2013 champion Petra Kvitova of the Czech Republic beat Madison Brengle of the United States 6-3 6-3 to set up a meeting in the second round with Olympic champion Monica Puig of Puerto Rico.
