US Open Tennis Federer R. v Robredo T Live online

The 52nd-ranked Ukrainian, who had never previously been past the third round of a Grand Slam, 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.

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 number one Dinara Safina, and Belgium's 50th-rated Yanina Wickmayer.

With Safina and fifth seed Jelena Jankovic eliminated from their upset-filled quarter of the draw, at least one unlikely player will emerge for a fairy-tale trip into the last four.

Bondarenko, who saved a match point in her first match before defeating 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.

The Ukrainian romped through the first set in 22 minutes, winning eight-of-nine 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.