Postecoglu has generally been angry with how Spurs have conducted themselves in the build up to their loss against Man City, and was filmed angrily clashing with a supporter.
Tensions ran high at the Tottenham Hotspur Stadium on Tuesday night as Tottenham faced Manchester City in a crucial Premier League clash.
However, it wasn't just the action on the pitch that sparked controversy, but also the sentiments of some fans in the stands.
The match, which ended in a 2-0 defeat for Tottenham, saw manager Ange Postecoglou facing criticism from a supporter who suggested that the team should throw the match to thwart Arsenal's title hopes.
Postecoglou's response was swift and vehement, captured on film and shared on social media.
"What did you say? What did you say before that? Just so I know who you are. There you are. I’m watching you. Watch your mouth, huh?" Postecoglou's fiery retort echoed, revealing his disdain for the idea of deliberately losing a match.
Throughout the game, there was a subdued atmosphere among the home fans, with chants focusing more on taunting rivals Arsenal than rallying behind their own team.
Postecoglou expressed frustration at this, emphasizing the importance of crowd support in influencing the players' performance.
In the post-match press conference, Postecoglou acknowledged the impact of the subdued atmosphere on the team but refused to place blame on the fans.
"Of course it does. It is what it is. I can't dictate what people do. They're allowed to express themselves any way they want. But yeah, when we've got late winners in games it's because the crowd's helped us," he stated.
Despite the loss, Postecoglou defended his players' performance, highlighting their ability to match up against the reigning champions.
"Well I think, unless I was watching a different game, we matched it with the best team in the land for the last four years, unless someone saw it differently," he asserted.
With Tottenham's season drawing to a close and a spot in the Europa League secured, Postecoglou and his team will now focus on their final fixture against Sheffield United. However, the controversy surrounding fan sentiment serves as a reminder of the passionate emotions that football ignites, and the importance of integrity in the sport.