Women's round-up - day seven
Top seed Kim Clijsters defeated America's Meghann Shaughnessy 6-2 6-4 to reach the quarter-finals of the US Open.
The Belgian world number one had few problems, equalling her best-ever showing at the tournament as she won in just 73 minutes.
Clijsters took a tour-best 71st victory of the year, denying 17th seed Shaughnessy, her first Slam quarter-final in the process.
"She made a lot of mistakes, definitely with her forehand return," Clijsters
"I created a lot of opportunities for myself to win, to have short points
and to keep them short."
Clijsters will now play fifth seed Amelie Mauresmo, who beat Thailand's Tamarine Tanasugarn 6-2 6-2 in just 77 minutes.
Mauresmo has only once been beyond the quarter-finals at Flushing Meadows, losing in the semis last year.
Lindsay Davenport overcame a foot problem and the challenge of Russian Nadia Petrova to reach the last eight.
The American third seed won 6-0 7-6 6-2 against the 19th seed but late in the game she seemed hampered by the injury which has affected her in recent months.
"My foot started to get a little sore at the end," said Davenport. "Nothing major, but I did want to end the match and get off the court.
"The problem is what it is. I still got through quite a long match and that feels good.
"I want more than anything to finish the tournament, so I'm going to be taking all the anti-inflammatories and doing whatever I can to make sure my body feels good."
Davenport breezed through the first set in 22 minutes without losing a game, but Petrova got into gear in the second and took a hard-fought tie-break 8-6.
Too many unforced errors, particularly on her weaker forehand side, cost Petrova dearly and she was broken twice in the deciding set.
Davenport goes on to face 24th seed Paola Suarez, after the Argentine beat Russia's Elena Likhovtseva 6-2 3-6 7-5.