Think it's racket technology or faster playing surfaces? The actual answer, many experts believe, comes from within the players themselves.
American Steve Johnson had to retire from his first-round match at the US Open because of severe cramping.
Russian star plays 23rd three-set match this season to advance in New York
Eugenie Bouchard made a winning debut on Arthur Ashe Stadium on Thursday night, while another WTA Rising Star pulled off a massive upset over the No.8 seed.
For the second straight day there was a massive upset at the US Open, as WTA Rising Star Karolina Pliskova served up a second round victory over Ana Ivanovic.
Petra Kvitova's memorable summer continued with a defeat of fellow Czech Petra Cetkovska in the second round of the US Open on Thursday.
Serena Williams dropped just one game against Vania King, setting up a US Open third round encounter with her third straight American opponent.
In the series premiere of Road To Singapore: The Series, presented by Xerox, four of the biggest WTA stars break down the WTA calendar. Watch it right now!
The Williams sisters were given a significant test by No.7 seeds Timea Babos and Kristina Mladenovic, but were victorious in the first round of the US Open.
Who has a chance to pass Agnieszka Radwanska on the Road To Singapore leaderboard after the Pole's upset second round loss at the US Open?
Throughout the US Open fortnight, wtatennis.com contributors will bring us a little closer to the action and the players. Today, Nick McCarvel brings us all the latest from Court 17.
Who was her tennis idol? What animal is she most afraid of? What superpower would she want to have? The US Open asked Nicole Gibbs 15 rapid fire questions. Watch the video right here!
Could the WTA have a week-long, World Cup-style team event in its future? A poll during the first six months of the year suggested fans want new events - the New York Times investigated.
Top 10 players Simona Halep and Eugenie Bouchard look to be WTA stars of the present and future.
The US Open champion and runner-up the last two years, Serena Williams and Victoria Azarenka, respectively, will both take on Americans in second round play.
First things first, she was born in 1999 and is 15. Beyond that, the Californian likes Urban Outfitters and rowdy fans, and according to her coach, she has an abnormal presence on the court.
Questions loom as to how much longer the two-time Grand Slam champ will go