World number one Novak Djokovic moved past Ryan Harrison into the third round of the Cincinnati Masters.
The Serb capitalised on the American's unforced errors to take the first set 6-2.
Harrison's game didn't improve in the second and Djokovic punished him by winning the set 6-3.
The 2011 Wimbledon winner will face Radek Stepanek in round three.
