Andy Roddick of the US leaves the court after his match with Novak Djokovic of Serbia in their men’s singles tennis match on day 9 of the Australian Open in Melbourne on January 27, 2009. Roddick powered into the Australian Open semi-finals when defending champion Novak Djokovic pulled out with illness trailing 7-6 (7/3), 4-6, 2-6, 1-2. AFP PHOTO / GREG WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)

Andy Roddick (R) of the US returns the ball to Fabrice Santoro of France during their men’s singles tennis match on the fifth day of the Australian Open in Melbourne on January 23, 2009. Roddick powered past outgunned French veteran Fabrice Santoro 6-3, 6-4, 6-2 to move into the fourth round of the Australian Open. The crafty Santoro was playing his 66th Grand Slam, a record for tennis in the Open area, and was presented with a bottle of champagne by tournament director Craig Tiley after the match to mark the occasion. He confirmed that it was his last singles appearance at Melbourne Park after a remarkable 17-year run stretching back to 1991. AFP PHOTO / PAUL CROCK (Photo credit should read PAUL CROCK/AFP/Getty Images)

Andy Roddick of the US celebrates defeating Xavier Malisse of Belgium during their men’s singles match on the third day of the Australian Open in Melbourne on January 21, 2009. Roddick ground out a four-set win over 195th-ranked Belgian Xavier Malisse to reach the Australian Open’s third round. Roddick lost the opening set and battled through a third-set tie-breaker to take it 4-6, 6-2, 7-6 (7/1), 6-2 in two hours and 43 minutes. AFP PHOTO / GREG WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)