Kyrgios was grilled in his press conference but was quick to downplay any influence from the umpire: "I'm not sure it was encouragement".
Sixth seed Caroline Garcia, who looked in good form in beating Briton Johanna Konta in the first round, is up against Olympic champion Monica Puig on Grandstand, followed by men's seventh seed Marin Cilic, the 2014 champion, who meets Poland's Hubert Hurkacz. I wasn't really listening to him, but I knew it wasn't a good look - it didn't help me at all. I really like him as a human.(but) he did something he shouldn't have. It was not just about, 'How are you feeling?' 'Oh, I'm not feeling so well.' Go back up to the chair.
"He also informed Kyrgios that if his seeming lack of interest in the match continued, that as the chair umpire, he would need to take action".
Herbert added: "I don't think he has to go down and take the position of a coach, like you see on the WTA Tour. But his behaviour and motivation on court changed after this moment and then he dominated the match", Herbert said. It was not just about, 'How are you feeling?' 'Oh, I'm not feeling so well.
Kyrgios shrugged off the entire episode as nothing new but the sight of an umpire offering unsolicited advice was uncomfortable enough that the United States Tennis Association (USTA) made a decision to investigate the incident.
However, Herbert said he was "even more upset" about the USTA's statement and said the association is "clearly taking us for fools". From I what heard, knowing Mohamed, I think he has done it in a friendly way.
"We all hear on the video what the umpire said to Nick, overpassing his functions".
The US Open put out an official statement on the matter, but all it did was describe what took place - only, not very accurately. "Everyone is entitled to an opinion but I can assure you it wasn't coaching".
"He was down there for too long".
"But, as I said, I'm used to it because I've played there many times". It was a conversation and conversations change mindsets.
"I get what he was trying to do". That's why it won't happen again.
Totally revitalised, Kyrgios dropped just three games in the final two sets, sealing victory after two hours and 47 minutes.
Next up for the 37-year-old is a hotly-anticipated clash with Australia's Kyrgios, who recovered to beat Frenchman Pierre-Hugues Herbert earlier on Thursday.