It's a toss up sometimes whether Nick Kyrgios is more feisty when he is facing an opponent (and the umpire) or when he is in the interview room taking questions from the media.
Against Dustin Brown on Friday the Australian picked up a code violation after being heard to say "f------" and claimed at least one of gold-badge umpire Jake Garner's decisions was "horrendous" on his way to a 6-7 (3), 6-1, 2-6, 6-4, 6-4 second-round victory.
'Against' the media, or a British element at least, in his postmatch conference, Kyrgios was embroiled in a robust exchange with two reporters, and he probably got the better of that, too.
It started with a question about his conduct's effect on the image of the game -- to which the Australian claimed his "behaviour was really good throughout the match" -- and ended with a back and forth on whether one of the reporters he tangled with had ever sworn.
It reads like a pretty childish exchange in black and white but there was no love lost, that was for sure.
So Kyrgios' relationship with friction goes on. What was slightly different about his troubles on Friday was that his friend Dustin Brown was in his corner.
Not only did the pair exchange tweeners, smiles and, at the end, a cuddle at the end, they also both criticised Garner for the same things; Brown claimed decision both for and against Kyrgios were wrong.
At one point, Brown said to Garner: "Do you think that is normal that two players are complaining, do you think we are doing it for the fun of it?"
The answer to the question was not as simple as Brown may have thought, given how often Kyrgios alone has taken officials to task.
The 21-year-old, who on Thursday retweeted a follower's support for Viktor Troicki after his umpire rant, admitted, too, that friction can bring negative or positive energy for him.
Asked what was more often the case, he said: "I don't know. I'm two for two on matches, so positive."
It didn't look quite like that in the third set and John Lloyd, the former Great Britain Davis Cup captain, suggested on commentary for BBC interactive that Kyrgios let it go.
Lloyd told ESPN afterwards: "In that set he was extremely casual at times and looked like he wanted to get it over with, but you can't call it tanking because he won the match."
Brown, perhaps unsurprisingly, was forgiving of Kyrgios' "cussing" and on-court conduct. "I was definitely not any better or worse at 21," he said.
"The guy is 18 in the world. Let the guy play tennis. I'm pretty sure in a few years, he will have that sorted and then he's probably going to be even better."
If he is right, the courts and media interview rooms at Grand Slams will be just a little less acrimonious.