U.S. Open 2015 Day 2

U.S. Open 2015 Day 2

Victoria Azarenka

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Thanasi Kokkinakis

Streeter Lecka/Getty Images

Roger Federer

KENA BETANCUR/AFP/Getty Images

Bjorn Fratangelo

Clive Brunskill/Getty Images

Austin Krajicek

Elsa/Getty Images

Lesia Tsurenko

TIMOTHY A. CLARY/AFP/Getty Images

Caroline Wozniacki

Al Bello/Getty Images

Laura Robson

Clive Brunskill/Getty Images

Tomas Berdych

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Donald Young

JEWEL SAMAD/AFP/Getty Images

Donald Young

JEWEL SAMAD/AFP/Getty Images