Tokyo - Angelique Kerber of Germany has advanced to the third round of the Pan Pacific Open by beating Maria-Teresa Torro-Flor 6-0, 6-1 on Monday.
The fifth-seeded Kerber took advantage of five double-faults to defeat Torro-Flor at Ariake Colosseum.
In other second-round matches, seventh-seeded Petra Kvitova of the Czech Republic beat Belinda Bencic of Switzerland 7-5, 6-4, and Lucie Safarova of the Czech Republic defeated eighth-seeded Roberta Vinci of Italy 7-5, 6-4.
Ana Ivanovic of Serbia also advanced to the second round with a 6-1, 6-1 win over Annika Beck of Germany.
The No. 11-seeded Ivanovic lost the first game of each set but bounced back with six straight games to beat Beck.
Ayumi Morita was one of three Japanese players to advance to the second round.
Morita had six aces in a 7-6 (4), 6-3 win over Laura Robson.
Also, Misaki Doi rallied from 5-3 down in the third set to beat Varvara Lepchenko 6-7 (3), 6-0, 7-5 and Kimiko Date-Krumm beat Australian qualifier Anastasia Rodionova, who retired due to an abdominal injury in the second set with Date-Krumm leading 6-2, 4-1.
Results from the second day of the WTA Pan Pacific Open on Monday (x denotes seeding):
Petra Kvitova (CZE x7) bt Belinda Bencic (Switzerland) 7-5, 6-4
Angelique Kerber (GER x5) bt Maria-Teresa Torro-Flor (ESP) 6-0, 6-1 First round
Madison Keys (US) bt Carla Suarez Navarro (ESP x10) 5-7, 7-5, 6-2
Magdalena Rybarikova (SVK) bt Hsieh Su-wei (TPE) 6-2, 5-7, 6-0
Ana Ivanovic (SRB x11) bt Annika Beck (GER) 6-1, 6-1
Ayumi Morita (JPN) bt Laura Robson (GBR) 7-6, (7-4), 6-3
Kimiko Date-Krumm (JPN) bt Anastasia Rodionova (AUS) 6-2, 4-1 (ret.)
Misaki Doi (JPN) bt Varvara Lepchenko (US) 6-7, (3-7), 6-0 7-5
Flavia Pennetta (ITA) bt Daniela Hantuchova (SVK) 6-3, 6-3
Casey Dellacqua (AUS) bt Kristina Mladenovic (FRA) 7-5, 6-1
Eugenie Bouchard (CAN) bt Monica Puig (PUR) 6-0, 6-4
Peng Shuai (CHN) bt Risa Ozaki (JPN) 6-2, 6-1
Aleksandra Wozniak (CAN) bt Francesca Schiavone (ITA) 2-6, 6-4, 6-2