Novak Djokovic has continued his winning form by defeating Radek Stepanek in straight sets at the Cincinnati Masters.
The world number one proved too good for the Czech qualifier as he took the first set 6-3.
The Serb showed the range of shots which has propelled him to the top of the ATP rankings by seeing off his opponent in the second set 6-3.
Djokovic will face either Gael Monfils or Philipp Kohlschreiber in the quarter-finals.
