Andy Murray showed no ill-effects from the late finish of his second round clash at the Madrid Open as he dispatched wildcard Marcel Granollers in straight sets to reach the last eight.
Murray beat Philipp Kohlschreiber for the second time in three days early Thursday morning in a match that finished just before 3am local time, having started at 1am.
However, the British No.1 needed little time to see off Spaniard Granollers in his third round match as he won through 6-2 6-0 in little over an hour on court - before taking a swipe at the organisers.
"These are the ATP's biggest tournaments. We're told all of the time to speak well of the tournaments," Murray told Sky Sports. "If they want to see the top players playing the best tennis, don't have them play matches at three o'clock in the morning."
Murray's arrival in Spain was delayed after his BMW Open final victory against Kohlschreiber - initially scheduled for last Sunday - was postponed until Monday due to rain. He had already claimed same-day wins against Lukas Rosol and Roberto Bautista Agut in Germany last Saturday. Now, Murray hopes his scheduling will get easier.
He said: "I'm just going to try to recover as best I can, get myself up for every single match. The last five or six days have been tough. Munich was very difficult, obviously, on the Saturday ... Playing the three matches there and then the final was a tough one.
"[Wednesday] was tough too. Luckily I managed to get through this one fairly quickly [against Granollers]. It's been a good start for me. I'll try to go as far as I can and hopefully play a good match [on Friday], make it tough for whoever it is I'm playing against."
Granollers, though, did not pose too much of a challenge for the world No.3. Murray enjoyed breaks in the fourth and eight games of the first set against Granollers on Arantxa Sanchez Vicario Court, which put him well on course for a speedy progression.
And the Scot dominated the second set further still as he broke Granollers three times - including coming back from 0-40 in the sixth game to complete victory with an impressive whitewash.
That means Murray, who claimed his first senior ATP World Tour title on clay in Munich, will face the winner of fifth seed Milos Raonic or Leonardo Mayer for a place in the semi-finals.
Earlier on Thursday, Rafa Nadal booked his spot in the last eight with a comprehensive win against Simone Bolelli, while there were also victories for Tomas Berdych and John Isner.