Pep Guardiola's Man City side were humiliated at the Etihad Stadium on Saturday evening, losing 4-0 to Tottenham.
The visitors handed City their largest defeat since moving from Maine Road in 2003 and the joint-heaviest Guardiola has ever suffered.
Saturday night's loss was also the champions' fifth straight in all competitions - the longest run in Guardiola's 17-year managerial career - just days after he extended his contract until 2026.
On a night of firsts, the Spaniard may never have heard the chant 'You're getting sacked in the morning!' directed at him until this evening, as Spurs fans revelled their side's performance, who move up to sixth in the table.
The taunting song rang around the Etihad before many City supporters headed out of the stadium prior to the final whistle. Later, Brennan Johnson's 93rd-minute dagger almost emptied the ground of home fans.
James Maddison opened the scoring in the 13th minute, before adding another just seven minutes later, netting twice from close range.
In the 52nd minute, Pedro Porro neutralised any threat of a second-half bounce from City, converting a sublime cross to the back post from Dominic Solanke.
In stoppage time, Timo Werner pounced on a wayward pass before rolling the ball across to Johnson, who tapped it in from a yard out to put the nail in the coffin for the hosts.
Guardiola partly attributed his side's disappointing performance to his players' late return from the recent international break.
However, he recognised that they will quickly have to recover for their Tuesday night Champions League game against Feyernoord, which comes before a blockbuster clash in the league with table toppers Liverpool next Sunday.
'I have to see the situation. The players came back late [from internationals]. There were a few reasons we're not able to be consistent,' he told Sky Sports.
'Now the balance is not in the right moment. But it happened. We have to do it, talk and on Tuesday against Feyenoord have the chance to try.
'Before the game I didn't know what will happen today. So I don't know what will happen at Anfield.
'Everyone knows the situation is new for us. We struggled more without the ball. I don't know how many chances we created. Our game was there.'