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Stan Wawrinka

(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

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

Stan Wawrinka celebrates after his victory against Rafael Nadal during the men's singles final of the Australian Open on Jan. 26, 2014. (credit: Getty Images)

Grand Stan! Wawrinka Upsets Rafael Nadal In Australian Open Final

Stan Wawrinka added a win over Rafael Nadal to his list of firsts in a stunning run to his maiden Grand Slam title, extending his rival’s injury-cursed run at the Australian Open with a 6-3, 6-2, 3-6, 6-3 upset in Sunday’s final.

01/26/2014