KEY BISCAYNE, FL – MARCH 25: Serena Willaims returns a shot to Angelique Kerber of Germany during their match on Day 9 of the Sony Open at Carndon Park Tennis Center on March 25, 2014 in Key Biscayne, Florida. (Photo by Mike Ehrmann/Getty Images)
KEY BISCAYNE, FL – MARCH 25: Serena Willaims returns a shot to Angelique Kerber of Germany during their match on Day 9 of the Sony Open at Carndon Park Tennis Center on March 25, 2014 in Key Biscayne, Florida. (Photo by Mike Ehrmann/Getty Images)
