Wozniacki in Rd 3
World number two Caroline Wozniacki powered her way past Greta Arn of Hungary to reach the third round of the Pan Pacific Open women's tennis tournament on Tuesday.
The Danish top seed, put the disappointment of withdrawing through illness in the first round last year behind her with a 6-1, 6-3 victory.
US Open finalist Vera Zvonareva of Russia and French Open champion Francesca Schiavone of Italy safely went through, but last year's French Open champion 10th seed Svetlana Kuznetsova of Russia, fell to Andrea Petkovic of Germany 6-3, 7-5.
Second seed Zvonareva, who reached a career-high fourth after the US Open, struggled to hold her serve before serving out for 6-3, 6-3 win over Sara Errani of Italy, while fifth seed Schiavone beat Alexandra Dulgheru of Romania 7-5, 6-3.
Top seed Wozniacki comfortably took the first set as Arn hit seven double faults, one on a break point, and failed to keep her service games three times.
Arn, who defeated Wozniacki when the Dane was ranked 120th in 2007, stopped double-faulting in the second set, but Wozniacki stood firm in her service games and never gave the Hungarian a single break opportunity in the set.
Wozniacki broke the third game when Arn hit a forehand wide and cashed in on a second match point with Arn's backhand error that landed in the net for another break in the ninth game.
"It's a new tournament every year for me. I always try to do my best and I'm happy that I won and got through this first match," said Wozniacki who won the Japan Open two years ago.
"It's nice for me to get through this one and to get a comfortable win. It's a really fast court and you need to just be focused all the way, because one game can change the match.
"So I'm happy and now I'm just looking forward to my next match and we have to see what's going to happen," she added.
In the third round, Wozniacki will take on Anastasia Pavlyuchenkova of Russia, the winner over Kateryna Bondarenko of Ukraine 6-2, 6-1.
In other second-round action, seventh seed Elena Dementieva of Russia, a gold medallist at the Beijing Olympics in 2008, was an easy 6-0, 6-1 winner over Yaroslava Shvedova of Kazakhstan.
Eighth seed Victoria Azarenka of Belarus, who collapsed in the US Open second round, showed no ill effects to beat Lucie Safarova of the Czech Republic 6-1, 6-3.
Japan's Kimiko Date Krumm, who shocked former world number one Maria Sharapova of Russia on Monday, caused another upset 2-6, 6-0, 4-0 over Daniela Hantuchova when the Slovakian abandoned the match due to shoulder pain.