The City boss confessed feeling "shame" following an exchange with a camera operator in the wake of the Citizens' loss at Newcastle on Saturday.
When the match concluded, an emotional Guardiola stepped onto the field and engaged in intense talks with match official Sam Barrott and Magpies midfielder Bruno GuimarĂŁes, and also touched the headphones of the camera operator.
"I apologised," Guardiola stated. "I'm humiliated, regretful, looking back. It's not acceptable. I immediately apologized to the cameraman. I am who I am. After 1,000 games I’m not a perfect person, I make huge mistakes."
"What is for sure, I defend any team and my club, without a doubt. Why I support my squad is no doubt – based on my career to clinch the title we need near-perfect totals, high nineties, otherwise we don’t win it."
The team sits in third and trail leaders Arsenal by seven points following their fourth loss of the season. "Losing four games out of 12 we have to improve a lot," he conceded. "Technically, we can still achieve all."
When questioned about a potential quadruple could be achieved, he responded: "As a seasoned reporter, did you hear my talk about the quadruple last winter during our historic run? Never."
Regarding his confrontation with Guimarães, Guardiola said: "We have known Bruno a long time and post-match, even at the Etihad, we converse. Our paths always cross and we get along well. I enjoy it. I’m an emotional guy, I like discussing and gesticulate."
He wouldn't mind if an opposition manager addressed his squad immediately after a game. "No - as long as you talk with respect like I always have done, it's fine," he noted, mentioning the referee. "He was part of it for 95 minutes, 98 minutes, constantly. Goodness, very much so."
City were unhappy that the officials denied a spot-kick for a Fabian Schär challenge against Foden, while they also questioned if Guimarães was offside on Barnes' goal the decisive strike. Pictures published later show he was level.
He will manage of his 100th Champions League game versus Leverkusen this week. "That's impressive, showing we compete annually," he commented.
The club has ten points from four matches in the group, and Leverkusen hold five.
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