By Beret Remak
Serve-and-volley: Two Americans soar on Fourth of July
Joe Klamar/AFP/Getty Images - Facing 19 break point chances on her serve, Maria Sharapova was broken four times by Venus Williams.
Alex Livesey/Getty Images - With her left hand bothering her, Serena Williams had difficulty with her backhand.
Clive Brunskill/Getty Images - Paul-Henri Mathieu had just two aces to Andy Roddick's 19.
Ryan Pierse/Getty Images - Novak Djokovic paced 39 winners, including 11 aces, to 36 unforced errors.