Roddick will face Croatia's Cilic as he bids to reach the semi-finals for the fourth time.
Roddick hasn't been shy in his courtship of Williams, a close friend since they were children.
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The last American male to win a major was at the 2003 U.S. Open (Roddick).
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With his victory, seventh-seeded Roddick has now reached the Australian Open semifinals four times.
The charity party was just one of five events Roddick had to attend that night.
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Andy Roddick also defended the late withdrawals of his fellow players at recent Masters events.
Roddick, who improved his record to 40-9 this season, has won their last two encounters.
Roddick even fought his way back into the top ten on August 23rd, at number 9.
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He got one when he played Andy Roddick in Arthur Ashe Stadium last year.
"The current economic downturn has undoubtedly affected the recruitment of new police officers, " said Mr Roddick.
Roddick has not yet qualified for the World Tour finals in London next month.
The Australian Open champion was joined in the third round by 2003 Toronto champion Andy Roddick.
"I thought I moved well and most importantly I felt well physically, " stated Roddick.
The next highest-ranked Americans are Andy Roddick at 14 and John Isner at 18.
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Roddick defeated Russia's Igor Kunitsyn, who is ranked 99 in the world, 7-6 (9-7) 6-2 6-3.
Tommy Haas also retired injured from his match to join Andy Roddick in quitting the event.
In terms of volume, the most noticeable uptick also came after Roddick defeated Fognini.
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Tenth seed Andy Roddick retired hurt when leading 6-3 2-3 against Guillermo Garcia-Lopez of Spain.
Roddick, the world number seven, cited personal reasons for missing the Masters in Italy that starts Sunday.
It was revenge for Querrey who lost to Roddick in the semifinals in San Jose last week.
"Regardless of what happens, he'll be watching the matches and we'll be talking, " said the 24-year-old Roddick.
World number two Nadal and world number six Roddick are currently in China for the Shanghai Masters.
' But curiously, because I've checked with her, Mr Winston Roddick didn't disclose any party affiliation whatsoever.
Cilic will face Andy Roddick after coming through a marathon fourth-round match after four hours and 38 minutes.
He wasted one with a double fault and Roddick, urged on by a home crowd, saved two more.
Federer will next face Swiss compatriot Stanislas Wawrinka after he disposed of American Andy Roddick in straight sets.
Meanwhile, Andy Roddick has confirmed he will not play for the United States in David Cup this year.
Home favorite Andy Roddick, playing in his final tournament, is looming as a possible quarterfinal opponent for Djokovic.
Mr Roddick won the race to be Police and Crime Commissioner for North Wales as an independent candidate.
Oh ya, and then there has been this other guy that has made life tough for Mr. Roddick.
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