<p>The Italian fifth seed had too much firepower for Japan's Date Krumm, comfortably advancing to the quarter-finals of the $2 million Tokyo event. <br /><br />Date Krumm, champion in 1995, blamed fatigue for her flat performance after knocking out Daniela Hantuchova and defending champion Maria Sharapova. <br /><br />Date Krumm quit tennis in 1996 before coming out of retirement in 2008. This year, she became the oldest woman to beat a top 10 player by knocking Dinara Safina out of the French Open. In other matches, Danish top seed Caroline Wozniacki edged closer to seizing the number one ranking with a 6-1, 6-2 thrashing of Russia's Anastasia Pavlyuchenkova. <br /><br />Second seed Vera Zvonareva outmuscled Italian Roberta Vinci 6-4, 6-0 to set up a quarterfinal against fellow Russian Elena Dementieva, who beat Italy's Flavia Pennetta 6-4, 6-2.</p>
<p>The Italian fifth seed had too much firepower for Japan's Date Krumm, comfortably advancing to the quarter-finals of the $2 million Tokyo event. <br /><br />Date Krumm, champion in 1995, blamed fatigue for her flat performance after knocking out Daniela Hantuchova and defending champion Maria Sharapova. <br /><br />Date Krumm quit tennis in 1996 before coming out of retirement in 2008. This year, she became the oldest woman to beat a top 10 player by knocking Dinara Safina out of the French Open. In other matches, Danish top seed Caroline Wozniacki edged closer to seizing the number one ranking with a 6-1, 6-2 thrashing of Russia's Anastasia Pavlyuchenkova. <br /><br />Second seed Vera Zvonareva outmuscled Italian Roberta Vinci 6-4, 6-0 to set up a quarterfinal against fellow Russian Elena Dementieva, who beat Italy's Flavia Pennetta 6-4, 6-2.</p>