UEFA appeared to mock Bayern Munich's decision to appoint Thomas Tuchel on their live blog during Tuesday night's Champions League fixture.
Manchester City put one foot in the semi-finals as they beat the German champions 3-0 in the first leg of their last-eight tie at the Etihad Stadium.
However just before City made it 2-0, UEFA posted a comment in the 74th minute which read: 'A penny for Julian Nagelsmann's thoughts right now...'
It appeared to ridicule the Bundesliga club after they ruthlessly sacked Julian Nagelsmann last month.
Former Chelsea, PSG and Borussia Dortmund boss Tuchel, 49, was appointed as his replacement.
The first half was evenly contested but City claimed the initiative with a spectacular strike from Rodri after 27 minutes.
A powerful header from Bernardo Silva and Erling Haaland's 45th goal of a remarkable season wrapped up a convincing win as City stepped up the pressure in the second half.
City manager Guardiola, who reached the last four three times as Bayern boss, said: 'Emotionally I'm destroyed. I have 10 more years today. It was so demanding a game. It was not comfortable.
'Now I have to relax - a day off for the guys, prepare for Leicester (in the Premier League on Saturday).
'After five, six minutes it was a tight game and in part of the game they were better than us. It was difficult to control them.
'In the last minutes of the (halves) we were better and we scored three fantastic chances.'
With the second leg still to come in Germany next week, however, Guardiola is not taking anything for granted.
He said: 'It was an incredible result but I know a little bit what can happen in Munich.
'If you don't perform really well they are able to score one, two, three. I know that, the players know that.
'It's an incredible result, but we have to do our game with huge, huge personality. If we don't do our game anything can happen.
'To knock out these teams you have to have two good games, not just one.'