Back to the drawing board for Erik ten Hag, then! After four successive league wins, Manchester United were embarrassed by their neighbours Manchester City at the Etihad Stadium, beaten 6-3 - and it could have been even more!
On the back foot from the first whistle, first-half braces from Phil Foden and Erling Haaland put City in complete control as United wilted on derby day.
And though they got goals back via Antony's stunner and a late double from substitute Anthony Martial, Foden and Haaland were able to complete respective hat-tricks to ensure Manchester remains blue.
Questions will be asked of Ten Hag's decision not to start the likes of Casemiro, while an injury suffered by Raphael Varane could give him a further headache as he looks to pick his side up off the canvas.
He has done it before already during his short tenure, but this is undoubtedly a big step back from the 20-time English champions.