Murray, who came through his seemingly mandatory annual Wimbledon scare at dusk against Fabio Fognini on Friday night, faces another unpredictable opponent in Benoit Paire second on Centre Court on Monday. "Hopefully she keeps going".
"You've got four of the all-time great male players: Rafa, Roger, Novak and Andy". No. 2-seeded Simona Halep, Muguruza vs. two-time major champion Svetlana Kuznetsova and Rybarikova against 24th-seeded CoCo Vandeweghe of the U.S.
"Actually, I feel like I play my best when I'm not thinking", he said, "I've told many coaches that".
"There's quite a few spots on the court, like just behind the baseline and just in front of the baseline, where there's quite big lumps of grass, sort of nearly like little divots there, which I don't remember really being the case", he said.
"I don't know if it's down to the weather".
"Federer, [Novak] Djokovic and [Andy] Murray all passed comment on the supposedly dry, hard and slippery condition of the grass, with the blame falling on the long spell of hot weather the South-East has experienced over the past two months. I think he has no problem".
While Paire tested Murray in rallies, the top seed mastered the distracted Frenchman in the mental game.
The Scot has won his last 25 meetings against French players, with his last defeat in February 2015 against Gilles Simon.
His serve was turned over twice in the first five games of the opening set and he'd save another eight break points on the way to a 7-6 6-4 6-4 victory.
Murray added: "He has a very different game to a lot of the guys now".
World number one Andy Murray will be roared on every step of the way in week two at Wimbledon.
Count Federer among those shrugging at the quartet's success so far this fortnight, with only one set dropped among the lot.
The 2010 finalist at the All England Club beat eighth-seeded Dominic Thiem of Austria 6-3, 6-7 (1), 6-3, 3-6, 6-3 on No. 3 Court.
After a tight first set, Murray was moving well with his opponent describing him as being "like a rabbit". "It's going to be a tough battle for me". Who is she playing?
"I practised last week on court 18 and I thought: 'Oh, the grass doesn't look so good on this court, it's not in the best shape.' Maybe it was the warm weather the week before, I don't know".
He said: It was a bit softer, especially around the baseline area.
Yes, yes, Andy. And you are the number one player in the world.
So after the first week of the greatest #Grand Slam tournament of them all, who is looking in good shape to end up on the honors board at SW19?
Defending champion Murray - who became just the third man to reach the quarter-finals in 10 successive years at a grand slam event - will face Sam Querrey or Kevin Anderson in the last eight. If his serve fires, he will challenge Murray - he won't win though. Azarenka, the Belarusian former world number one, is on the comeback trail after giving birth to her first child, Leo, in December.
It's a phenomenon in the Grand Slams unique to Wimbledon and this particular Monday - "manic" Monday is apparently now the preferred descriptor, leaving The Bangles with much to answer for - looks particularly grand, featuring players with 64 Grand Slam singles crowns between them.