Online editor Ed McGrogan and senior writers Peter Bodo and Steve Tignor predict four of Day 9's matches:
Angelique Kerber vs. Flavia Pennetta [26] (Women's quarterfinal)
Bodo: Pennetta Kerber has had the tournament of a lifetime, but she’ll run out of luck when she meets the seasoned veteran Pennetta, who has a versatile game and greater experience under the glare of the limelight.
Tignor: KerberNeither woman has made a Slam semi before, so nerves will play a role. Pennetta is the more experienced player and is coming off a win over Maria Sharapova, but Kerber is the heavier hitter and is flying way under the radar.
McGrogan: PennettaFrancesca Schiavone, Pennetta’s Fed Cup teammate, went from team triumph to solo success, and the Italian’s cushy draw means she could do the same. It’s hard to imagine the veteran letting this opportunity pass her by.
Vera Zvonareva [2] vs. Samantha Stosur [9] (Women's quarterfinal)
Bodo: ZvonarevaBoth have struggled to sustain recent, career-best results (Stosur was the 2010 French runner-up, Zvonareva was a Wimbledon and U.S. Open finalist last year). Look for Zvonareva to punch through to the semis.
Tignor: StosurThe lower-ranked Stosur has won the last seven times they’ve played. The last two were in three sets, and Zvonareva, last year’s runner-up, has found her form this summer, but Stosur has looked calmly determined so far in Flushing.
McGrogan: ZvonarevaBoth impressed in Round 4: Zvonareva overwhelmed Sabine Lisicki while Stosur recovered against Maria Kirilenko after losing a 17-15 tiebreaker. We knock Zvonareva, but her recent play can’t be overlooked.
Andy Murray [4] vs. Donald Young (Men's fourth round)
Bodo: MurrayYoung has had a terrific run, but Murray is the master of the kind of crafty game Young likes to play. Murray’s service return will put Young on the defensive from the get-go. It’s hard to see Young getting even a set.
Tignor: MurrayYoung won their last meeting, in Indian Wells, by hitting big, but that was after Andy Murray was suffering from an Aussie Open hangover. He seems to have new momentum after his five-set escape against Robin Haase last week.
McGrogan: MurrayAfter a post-Oz funk, Murray has had a strong summer. For the Slam-less Scot, only a major will do, while Young’s run here has already exceeded expectations. Murray has more to play for and is the better player.
Andy Roddick [21] vs. David Ferrer [5] (Men's fourth round)
Bodo: RoddickFerrer has a lot of game off the ground, which means Roddick will be best served by playing a more imposing, serve-driven game. Roddick needs to return well to keep Ferrer at arm’s length. and off-balance.
Tignor: RoddickThe Spaniard has had success outgrinding Roddick in the past, including in Davis Cup two months ago. But Roddick, floating on NYC crowd support, has a new lease on life. A night-match atmosphere might put him over the top.
McGrogan: FerrerIf Roddick wins this, it won’t be with ease—he’s been anything but automatic this season. Problem is, Ferrer does some of his best work in longer matches. Roddick will have the crowd, but he’ll need everything else, too.