from the Beeb http://news.bbc.co.uk/sport1/hi/tennis/4669786.stm
Hingis shows off ruthless streak
Martina Hingis backed up her claim that she is "improving every week" with a stunning 6-0 6-0 victory over Cho Yoon-jeong at the Pan Pacific Open.
Hingis, who returned to tennis last month after retiring in 2002, took just 33 minutes to seal a first-round win over her Korean opponent in Tokyo.
"It shows the potential is there and I'm improving every week," said Hingis.
The Swiss, a four-time winner of the event, was never troubled and dropped five points in a 14-minute first set.
The Swiss star made her return to Grand Slam tennis at the Australian Open last month and reached the quarter-finals of the singles as well as winning the mixed doubles.
"I probably exceeded my expectations in Australia and that confidence showed," she added.
The 25-year-old, who retired in 2002 after suffering a series of injury problems, will now take on French third seed Nathalie Dechy in the last 16.
Earlier, second seed Elena Dementieva claimed her first victory of 2006 with an unconvincing 2-6 6-1 7-5 second-round win over Katarina Srebotnik.
Dementieva suffered a shock first-round exit at the Australian Open.