As he was applauded off in the most humiliating of fashions by Crystal Palace fans on Monday night, it won't have needed to be pointed out to Erik ten Hag that this was the nadir of his tenure.
There have been heavier defeats during his time in charge - a 7-0 loss at Liverpool a year ago being one of them - but few proved to be as deflating and as galling as this 4-0 turnover by Crystal Palace.
His future at Manchester United is now more precarious than it has ever been and even some of his most ardent supporters in the fan-base are growing weary as calls for change grow louder.
Mail Sport looks at the reasons life at United has unravelled for the Dutchman…
When Ten Hag - rather than if - is shown the door by United he will invariably point to the injury crisis he has had to contend with as his lead defence.
Bruno Fernandes, so often Mr Reliable, missed Monday night's game making it 64 cases of injury or illness that have caused a player to miss a game this season.
Ten Hag has had to contend for a lot of the season without Lisandro Martinez - his best centre back - and Luke Shaw - his best left back - while Rasmus Hojlund was sidelined just when he was enjoying a purple patch in front of goal.
Harry Maguire has been integral this season and yet he has gone down and is now in a rush to be fit for the FA Cup final. There is rotten luck and then there are 64 cases of injury and illness. Truly unprecedented numbers.
What isn't going to be a mitigating factor for the Dutchman is his recruitment which, if you were being unkind, has been near-disastrous.
Nine of the starting XI at Palace were signed or promoted from the academy by Ten Hag, while Diogo Dalot has since been handed a new deal. Only Aaron Wan-Bissaka has totally preceded
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