US Open: Day 4

In This Photo: Aleksandra Krunic
Aleksandra Krunic of Serbia returns a shot against Madison Keys of the United States during their women's singles second round match on Day Four of the 2014 US Open at the USTA Billie Jean King National Tennis Center on August 28, 2014 in the Flushing neighborhood of the Queens borough of New York City.
(Aug. 27, 2014 - Source: Alex Goodlett/Getty Images North America) more pics from this album »