(CNN) -- Kimiko Date Krumm celebrated her 40th birthday by reaching the third round of the Pan Pacific WTA tournament in Tokyo as opponent Daniel Hantuchova retired when trailing in the deciding set on Tuesday.
The victory, albeit aided by a shoulder injury to her Slovakian opponent, continues the veteran's remarkable run in her home tournament.
She shocked defending champion Maria Sharapova in the first round, but when Hantuchova took the first set 6-2, it looked to be coming to an abrupt end.
But in a stunning turnabout, Date Krumm proceeded to claim the next 10 games, leading 4-0 in the third set when 27-year-old Hantuchova called it a day.
The Japanese ace is attempting to win the tournament, played on a fast indoor surface, 15 years after her previous success in 1995.
In other second round action, top seed Caroline Wozniacki swept past Greta Arn of Hungary 6-1 6-3 to reach the third round of the Pan Pacific Open women's tennis tournament on Tuesday.
The Dane won the Pan Pacific title two years ago and is upbeat about her chances this year.
"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," she told the official WTA website.
In the third round, Wozniacki will take on Anastasia Pavlyuchenkova of Russia, who beat Ukraine's Kateryna Bondarenko of Ukraine 6-2 6-1.
U.S. Open finalist Vera Zvonareva of Russia and French Open champion Francesca Schiavone also went safely through.
Second seed Zvonareva, beaten by Kim Clijsters in the Flushing Meadows finale, had a 6-3 6-3 win over Sara Errani of Italy, while fifth seed Schiavone saw off Alexandra Dulgheru of Romania 7-5 6-3.
2008 Olympic gold medallist Elena Dementieva of Russia lost a single game in beating Yaroslava Shvedova of Kazakhstan, while eighth seed Victoria Azarenka of Belarus, who collapsed on court at the U.S. Open, beat Lucie Safarova of the Czech Republic 6-1 6-3.