US Edition 
US Open 2009: Gisela Dulko loses 6-0, 6-0 to Kateryna Bondarenko
Kateryna Bondarenko, never better than a third-rounder at a Grand Slam, avenged family honour and advanced into the US Open quarter-finals on Monday by blanking Argentina's Gisela Dulko 6-0, 6-0.
The 52nd-ranked Ukrainian took just 47 minutes to rout the 40th-ranked South American who had eliminated her older sister Alona 6-4, 6-0 in the second round on the Flushing Meadows hardcourts.
"I watched that match," the younger Bondarenko said, adding that she had received some advice from her sibling on how to play Dulko but adding, "It's kind of a family secret."
Bondarenko, who is coached by her parents, will seek a semi-final berth against the winner of a later match between 72nd-ranked Czech teen Petra Kvitova, who ousted world No 1 Dinara Safina, and Belgium's 50th-rated Yanina Wickmayer.
With Safina and fifth seed Jelena Jankovic ousted from their upset-filled quarter of the draw, at least one unlikely upstart Cinderella will emerge for a fairy-tale trip into the last four on the Flushing Meadows hardcourts.
Bondarenko, who saved a match point in her first match before ousting Serbian 11th seed Ana Ivanovic, made her case for the storybook spot by ripping Dulko, who had been the top-rated woman remaining in their quarter.
Bondarenko romped through the first set in 22 minutes, winning 8-of-9 points on Dulko's second serve and taking advantage of 11 unforced errors.
The second set was just as lopsided. Bondarenko roared to a 4-0 lead, saved a break point in the fifth game with a backhand volley winner on the way to holding and broke to finish the rout.
Bondarenko, 23, won her only tour career title in Birmingham last year and became the first player from her homeland in the last eight of a Slam.
She will pass her prior career high of 37th in the rankings, passing her sister for top family honors for the first time since 2006.
French Open champion Svetlana Kuznetsova, the only player to beat Serena Williams at a Grand Slam event this year, will face Danish ninth seed Caroline Wozniacki in a night matchup of the top players in their half of the draw.
US teen giant-killer Melanie Oudin, who sent Maria Sharapova and fourth seed Elena Dementieva packing, goes for a quarter-final berth against Russian 13th seed Nadia Petrova in another later match at Arthur Ashe Stadium.