Marin Cilic returns a shot to Tomas Berdych during their quarterfinal match at the US Open on Sept. 3, 2014. (Photo by Streeter Lecka/Getty Images)

Cilic KOs No. 6 Berdych For Spot In US Open Semifinals

Marin Cilic reached his first Grand Slam semifinal in more than four years, upsetting sixth-seeded Tomas Berdych in straight sets at the U.S. Open.

09/04/2014

Novak Djokovic celebrates his victory over Andy Murray during their US Open men's quarterfinals match at the USTA Billie Jean King National Center September 3, 2014. (Photo by Don Emmert/AFP/Getty Images)

Djokovic To Face Nishikori In US Open Semis; Murray Drained, ‘Disappointed’

Eventually, the physically demanding action proved too much for a fading Andy Murray, and Novak Djokovic pulled away to reach the semifinals for the eighth consecutive year.

09/04/2014

(Left): Serena Williams of the United States reacts against Flavia Pennetta of Italy during their women's singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014. (Photo by Chris Trotman/Getty Images for USTA)

(Right): Novak Djokovic of Serbia serves against Andy Murray of Great Britain during their men's singles quarterfinal match on Day Ten of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2014. (Photo by Julian Finney/Getty Images)

Serena Williams, Novak Djokovic Off To US Open Semifinals

After a bad-as-can-be start, dropping the first three games, Serena Williams quickly turned things around and stretched her U.S. Open winning streak to 19 matches to get back to the semifinals.

09/03/2014

Kei Nishikori of Japan celebrates after defeating Stan Wawrinka of Switzerland in their men's singles quarterfinal match on Day Ten of the 2014 US Open. (Photo by Chris Trotman/Getty Images for USTA)

Liguori: Marathon Man Kei Nishikori Continues To Make History At US Open

Tenth seed Kei Nishikori became the first Japanese player in the Open Era to advance to a Grand Slam semifinal with a five-set win over 2014 Australian Open champion Stan Wawrinka 3-6, 7-5, 7-6, 6-7, 6-4.

09/03/2014

Kei Nishikori of Japan returns a shot against Stan Wawrinka of Switzerland during the US Open quarterfinals on Sept. 3, 2014. (Photo by Elsa/Getty Images)

Japan’s Nishikori Outlasts No. 3 Wawrinka For Spot In US Open Semifinals

The match went 4 hours, 15 minutes, and the 10th-seeded Nishikori managed to shake off any lingering exhaustion from his previous victory, which lasted 4:19 and ended at 2:26 a.m. Tuesday, equaling the latest finish in tournament history.

09/03/2014

Novak Djokovic (Photo by Matthew Stockman/Getty Images) and Serena Williams (Photo by Chris Trotman/Getty Images for USTA) in action at the 2014 US Open.

Murray-Djokovic, Serena-Pennetta Highlight Busy Wednesday At US Open

Andy Murray went more than a year between victories over top-10 opponents. Now he needs to make it two in a row.

09/03/2014

Roger Federer of Switzerland celebrates after defeating Roberto Bautista Agut of Spain in their men's singles fourth round match on Day Nine of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 2, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Streeter Lecka/Getty Images)

Roger Federer Back Into US Open Quarterfinals; Wozniacki To Semifinals

Federer was broken only once, part of a three-game run for Bautista Agut that took the score from 5-1 to 5-4. But Federer had no trouble the second time he tried to serve out that set, which he ended with a pair of aces.

09/02/2014

Gael Monfils of France returns a shot to Grigor Dimitrov of Bulgaria during their fourth round match at the US Open on Sept. 2, 2014. (Photo by Streeter Lecka/Getty Images)

Liguori: No Coach? No Problem For France’s Gael Monfils

Colorful Gael Monfils is back in the US Open quarterfinals.

09/02/2014

Shuai Peng of China celebrates her 6-2, 6-1 win over Belinda Bencic of Switzerland during their 2014 US Open women's singles match at the USTA Billie Jean King National Tennis Center. (Photo credit should read STAN HONDA/AFP/Getty Images)

Frenchman Monfils Upsets No. 7 Dmitrov For Spot In US Open Quarters

Gael Monfils beat Grigor Dmitrov 7-5, 7-6 (6), 7-5 on Tuesday to reach the quarterfinals of the U.S. Open for the first time since 2010.

09/02/2014

Andy Murray celebrates during his match against Jo-Wilfried Tsonga at the 2014 US Open. (Photo by Timothy A. Clary/AFP/Getty Images)

Andy Murray Advances, Sets Up Marquee Quarterfinal At US Open

Murray-Djokovic feels much more like a Grand Slam title match than a quarterfinal, and for good reason.

09/02/2014

Stan Wawrinka celebrates match point against Tommy Robredo on Sept. 1, 2014, at the U.S. Open. (Photo by Al Bello/Getty Images)

Stan Wawrinka Hangs On To Beat Tommy Robredo At US Open

Australian Open champ Stan Wawrinka tumbled into the stands, kept calling for the trainer, and still pulled away to reach the U.S. Open quarterfinals.

09/01/2014

Flavia Pennetta of Italy returns a shot against Casey Dellacqua of Australia during their women's singles fourth round match on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Julian Finney/Getty Images)

Serena Thrilled To Finally Make A Grand Slam Quarterfinal In 2014

Serena Williams reached her first Grand Slam quarterfinal of the year with a 6-3, 6-3 victory over Kaia Kenepi in the U.S. Open on Monday, keeping her hopes alive for a third straight Flushing Meadows crown.

09/01/2014

Serena Williams of the United States returns a shot to Kaia Kanepi of Estonia during their women's singles fourth round match at the US Open on Sept. 1, 2014.  (Photo by Elsa/Getty Images)

Liguori: Top Seeds Williams, Djokovic Have No Problem Beating The Heat

The top seeds made it look easy on a hot and humid Labor Day.

09/01/2014

Novak Djokovic of Serbia returns a shot to Philipp Kohlschreiber of Germany during their fourth round match at the US Open on Sept. 1 in New York City.  (Photo by Al Bello/Getty Images)

Djokovic Reaches US Open Quarterfinals For 8th Consecutive Year

Djokovic, the 2011 champion at Flushing Meadows, made only 19 unforced errors, saved both break points he faced, and breezed past 22nd-seeded Philipp Kohlschreiber of Germany 6-1, 7-5, 6-4 Monday.

09/01/2014

Catherine Bellis of the United States returns a shot against Renata Zarazua of Mexico during their junior girls' first round match at the US Open.  (Photo by Matthew Stockman/Getty Images)

Teen Sensation Bellis Begins Quest For US Open Junior Crown With Rout

Bellis played on the grandstand court, Flushing Meadows’ third-largest venue, to accommodate her following after her performance in the main draw.

09/01/2014