World number one Novak Djokovic of Serbia returns the ball to Spain's David Ferrer during their Mubadala World Tennis Championship exhibition match in the Emirati capital, Abu Dhabi, on December 28, ... more 

World number one Novak Djokovic of Serbia returns the ball to Spain's David Ferrer during their Mubadala World Tennis Championship exhibition match in the Emirati capital, Abu Dhabi, on December 28, 2012. Djokovic opened his season with an impressive 6-0, 6-3 win less