Pep Guardiola was irritable after Manchester City's defeat at Anfield this season.
The best in the business do not generally react well to losing, which is why they are the best in the business, but then again usually if his team have played well the Catalan is happy. Back in October, he was anything but.
The main source of ire was a disallowed goal at 0-0 for Phil Foden, saying repeatedly in numerous post-match interviews 'This is Anfield' as if City couldn't expect any decisions there. He also bristled at the idea that his team didn't create the chances to win the game, despite being comprehensively second-best in terms of expected goals as well as actual goals.