Jose Mourinho's most humbling nights... what happens next?
Jose Mourinho doesn't lose many matches, let alone many cup games, and very few would have predicted the EFL Cup defeat to Bristol City.
He therefore doesn't have much experience of responding to this kind of result: this was only his second-ever loss to lower league opposition, and the question is now, can his team bounce back against Leicester on Saturday night?
Events after the most humiliating defeats of his managerial career have tended to follow one of two paths. More often than not, the result shocks his team into action, focuses his attention and provides the spark before a run that leads to silverware, as the 4-0 defeat to Chelsea did last season.
The other option is rather more worrying: the defeat signals a sign of things to come, and ends up leading to the downfall of his empire.
Here, we cast an eye over Mourinho's most chastening defeats, with a look at how things panned out for him afterwards.
Manchester City 1 Chelsea 0 (Oct 2004)
Long before the days of Sheikh Mansour, a City side including Paul Bosvelt, Jon Macken and Ben Thatcher inflicted Mourinho's first defeat at Chelsea, after Kevin Keegan took the surprising decision to use striker Nicolas Anelka to man-mark defensive midfielder Claude Makelele.
What happened next: Chelsea responded to some effect, going unbeaten for the rest of the league season to win the title and also won the League Cup.
Middlesbrough 3 Chelsea 0 (Feb 2006)
Having already been knocked out of the League Cup by Charlton, the most embarrassing loss of Mourinho's first spell at Chelsea came at the Riverside Stadium, when the Premier League leaders went behind to a Fabio Rochemback strike after only 78 seconds and never recovered.
What happened next: Chelsea won their next three games before losing at Fulham, but they were far enough clear at the top of the table that those defeats mattered little.
They won the Premier League by eight clear points.
Chelsea 1 Rosenborg 1 (Sept 2007)
The result that ultimately did for Jose's first spell at Stamford Bridge.
Having already lost at Aston Villa and drawn at home to Blackburn, Mourinho went into this Champions League tie against lowly Rosenborg needed the kind of performance that convinces the club's hierarchy that he had the players pulling in the same direction.
Only 24,000 fans turned out at Stamford Bridge for a game everyone expected Chelsea to walk, but they ended up requiring an Andriy Shevchenko equaliser to scrap a point.
What happened next: Mourinho left the club two days later.
Inter 0 Panathanaikos 1 (Nov 2008)
Inter's Champions League draw in 2008/09 was as favourable as they come: they faced Werder Bremen, Anothosis Famagusta and Panathanaikos in Group B.
By the fifth round of fixtures they had dropped points at home to Werder and at Anorthosis, but they were still in top spot.
They went on to lose to the Greek side and surrendered first place in the group, thus forced to play Manchester United in the next round - a tie they lost.
What happened next: Inter won Serie A by 10 clear points but the season was viewed as a disappointment for their failure to improve in Europe.
Inter learned from their mistakes in Europe, and won the treble a year later.
Barcelona 5 Real Madrid 0 (November 2010)
An embarrassing night for Mourinho but one he refused to call a "humiliation", probably because Barcelona were so frighteningly good that there was little Real or Mourinho could do to stop them. The first of many defeats to Pep Guardiola, but still the most chastening.
What happened next: Real won the Copa del Rey, finished second in La Liga and reached the Champions League semi-final.
Borussia Dortmund 4 Real Madrid 1 (April 2013)
Mourinho's biggest failure in his time at Real Madrid was the lack of progress in the Champions League while rivals Barcelona and former club Chelsea both lifted the trophy.
In his third and final season in Spain, his side was humbled by Jurgen Klopp's Dortmund in the first leg of the semi-final. They won the second leg but couldn't haul themselves back from the three-goal deficit.
What happened next: Real came close on three fronts, but won nothing this season, losing to Atletico in the final of the Copa del Rey. Mourinho called it "the worst season of my career". He left the club shortly after its conclusion.
Chelsea 2 Bradford 4 (Jan 2015)
Six weeks after defeat at Newcastle and three weeks after a 5-3 loss at Tottenham, it looked like the wheels might be coming off Mourinho's first season back in England when Chelsea threw away a two-goal home lead against third tier Bradford.
They crumbled, conceding four goals to crash out of the FA Cup in circumstances Mourinho called "disgraceful". It was the first time he had ever lost to lower league opposition.
What happened next: Chelsea bucked up their ideas. They went 16 games unbeaten in the league to win the title, and also won the League Cup, exacting revenge over Spurs with a 2-0 win in the final.
Manchester City 3 Chelsea 0 (Aug 2015)
Mourinho's title defence didn't go as well as in his first spell: after the fiasco with Eva Carneiro at home to Swansea on the opening day of the season, Chelsea were crushed by City at the Etihad, with John Terry substituted at half time after a nightmare first 45 minutes.
What happened next: Chelsea lost at home to Crystal Palace and then away to Everyon, but a 2-0 victory over Arsenal meant everyone thought they had turned a corner...
Chelsea 1 Southampton 3 (Oct 2015)
1-0 up at home to Southampton, things were back to normal, right?
No. No, no, no, no, no. Saints scored three goals to turn the game on its head and leave Mourinho hanging on by a thread.
What happened next: Chelsea's downward spiral continues...
Chelsea 0 Bournemouth 1 (5 Dec 2015)
Funnily enough, the defeat that actually did for Mourinho was against champions-to-be Leicester, but losing 1-0 at home to newly-promoted Bournemouth was pretty embarrassing for Roman Abramovich.
What happened next: Mourinho is sacked 12 days later.
Chelsea 4 Manchester United 0 (Oct 2016)
Mourinho's Stamford Bridge return played out worse than Mourinho could have possibly imagined. United fall to eighth in the table and Mourinho is heckled by the fans that used to adore him.
What happened next: United tightened up, went 25 games unbeaten in the league, and won the EFL Cup and the Europa League.