(AP)
Updated: 2007-09-02 15:00

"The difference between that pressure and the pressure I have," Roddick explained, "is they lose and it's OK, you know?"

His next opponent, Berdych, is best known for upsetting Federer at the 2004 Olympics, and advanced Saturday with a 7-6 (2), 6-1, 7-6 (3) win over Fernando Verdasco.

Now Radwanska has her breakout moment, and she did it despite looking quite bad in the middle of the match.

"She destroyed me in the second set, but then I woke up," said Radwanska, who now plays No 18 Shahar Peer of Israel, a 6-4, 3-6, 7-6 (5) winner over No 13 Nicole Vaidisova of the Czech Republic.

Sharapova always appeared bothered by one thing or another. She started the match without a visor, then added one. She tried to wait out wind gusts before serving, then would catch her toss anyway.

And then there was what kept happening before Sharapova's second serves. Radwanska would walk halfway to the service box and stand there, before hopping in place and then shifting back some. It was not only a tactic, but also basically an insult, akin to saying, "Hey, Maria, I'm not intimidated by your serve in the least."

Sharapova insisted afterward that didn't rattle her - "I usually don't think about where my opponent's standing," she sniffed - yet three were all of those double-faults.

"It will be interesting to see," Sharapova said, "if she does it again next time I play her."

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