Defending champion Andy Murray reached the quarter-finals of the Madrid Open with an impressive 6-4 6-2 win over 16th seed Gilles Simon of France.
Second seed Murray, 28, broke Simon for the first time to take the opening set as part of a five-game winning run.
He then broke three times in the second set to complete victory in one hour, 38 minutes.
Britain's Murray will play either Czech Tomas Berdych or Spaniard David Ferrer in the last eight.
Murray's serve was never broken and the power and variety of his ground strokes was too much for Simon, 31.