We are heading down the stretch at the 2012 U.S. Open after some memorable matches on Wednesday.
On the men's side, Andy Roddick saw his career come to an end at the hands of Juan Martin del Potro, Novak Djokovic advanced, Andy Murray came from behind to beat Marin Cilic and Roger Federer suffered a shocking defeat courtesy of Tomas Berdych.
On the women's side, Serena Williams continued her dominance this year, disposing of Ana Ivanovic in straight sets, and Maria Sharapova emerged victorious over Marion Bartoli in three sets after dropping the first set.
Roddick won the first set over Del Potro via tiebreaker, 7-6, but ultimately fell, 7-6, 6-7, 2-6, 4-6. He ended his career with a 612-213 record and 32 singles titles, including a victory at the 2003 U.S. Open. He leaves behind a legacy as the only American who was able to adequately follow in the footsteps of Pete Sampras and Andre Agassi.
Djokovic will face Del Potro in the quarterfinals after Stanislas Wawrinka was forced to retire from Wednesday's match after getting medical assistance from his trainer.
Federer, the favorite at the tournament this year, was soaring before running into Berdych on Wednesday. After losing the first set via tiebreaker, he never was able to ultimately recover, falling, 6-7, 4-6, 6-3, 3-6.
Berdych, who beat FedEx in Cincinnati last year, notched an impressive 14 aces in the match while winning 80 percent of first serve points (52 of 65), per USOpen.org. He also hit 137 mph on his serve at one point and averaged 123 mph on his first serve.
Despite hitting 44 winners, Federer was plagued by 40 unforced errors (Berdych had 21). He had only 19 unforced errors against Fernando Verdasco in the third round before advancing to the quarterfinals following Mardy Fish's withdrawal from the tournament.
Murray put forth a valiant effort after losing the first set against Cilic, 3-6, and finding himself down, 1-5, in the second set. He battled back to capture the second set and the final two sets (3-6, 7-6, 6-2, 6-0). His mental game has vastly improved this year, most evident when he defeated Federer in the final of the 2012 London Olympics.
As for the women, Williams has been electric this year and that didn't change against Ivanovic, as she cruised to a victory, 6-1, 6-3. The London Games gold medalist now has 41 aces through five matches at the U.S. Open, tops on the women's side (per USOpen.org), and she's gone 24-1 since her first-round loss at the French Open.
Williams will go up against Sara Errani in the semifinals, who disposed of Roberta Vinci in straight sets on Wednesday, 6-2, 6-4.
Sharapova battled through early-match jitters to knock out Bartoli, 3-6, 6-3, 6-4. Sharapova was able to get past 11 double faults by notching 10 aces, winning 71 percent of first-serve points and dominating at net (8 of 10 net points won), per USOpen.org.
The 25-year-old Russian will face world No. 1 Victoria Azarenka in the semifinals.