Andy Murray and Marcel Granollers (right)

"I got through this one fairly quickly," added the Scot, who completed his win in 64 minutes. "It's been a good start for me. Hopefully, I'll play a good match in the quarters."
Earlier, Spanish third seed Rafael N remained on course for a third successive Madrid title following a 6-2 6-2 win over unseeded Italian Simone Bolelli. He will now face Bulgarian 10th seed Grigor D in the quarter-finals.