"For him it's more about focusing on what he's got to do here".
Murray, who did not face a break point, broke the Aussie's rocket serve again to go 3-1 up in the second set and the No 15 seed's wild slashed forehand almost hit the back wall along with the towel.
"Everything I say and everything I do out there, they all know I love them".
The second set lasted just 26 minutes after a tight first set, which Murray claimed by breaking Kyrgios in the 12th game.
The Scot has won the previous three, with his only lost set coming at the US Open last summer, but Kyrgios did manage a win over his rival at the Hopman Cup in January. I think when things get tough, I'm just a little bit soft.
Asked if there was part of him that was frightened to make a whole-hearted commitment to tennis, Kyrgios said: 'Possibly.
By the end Kyrgios looked utterly downcast, having been bewildered by the variety of his opponent's game as Murray mixed crunching cross-court forehands and thumping backhand winners with delightful variations of pace and spin.
And a win by the 2013 champ would seal his ninth straight trip to the quarter-finals at the All-England club.
Philippoussis has been a vocal supporter of Kyrgios for many years, but after a poor showing in his fourth round defeat to Andy Murray in which he was slammed for a lack of effort, even he is finding it hard to defend the wayward phenom.
Murray has yet to drop a set at this year's Wimbledon. I believed that I could win the match.
"I think it was by far my best match. I need to keep up my own form, and if I can stay as solid and as focused as I was today, I will have a chance".
"The last time I played him was at the US Open (last year) in a major". "They weren't easy. A few of the sets came down to just a couple of points".
" I don't really know a coach out there that would be pretty down for that one".
"When I see Roger (Federer), everyone sort of just looks at Roger".
"Ivan Lendl is a great person to have on the team when expectations start to build around me because he's been through the same experience himself, " Murray said in his BBC column.
It was perhaps not surprising that Kyrgios was unable to sustain his level of the first set given how much tennis he has played.
"Then one week I'll just not do anything, I don't really know a coach that would be pretty down for that one".
" Disappointment would be an understatement in describing Kyrgios' effort, particularly as the match went on", the American said. "I didn't lose in qualifying", he said.
"Kyrgios has to look in the mirror if he wants to become a top player and win Slams", said McEnroe, who was involved in a number of heated exchanges with umpires during his career. "To be honest, I woke up this morning and played computer games".
"I feel like I'm doing all right".