Leicester City were unable to repeat their heroics of earlier this season as they suffered a convincing 3-1 defeat to Manchester United at Old Trafford.
A poor first-half performance left Nigel Pearson's side with far too much to do, as strikes from Robin van Persie, Radamel Falcao and an own goal from City captain Wes Morgan have United a three-goal lead at the break.
City were right to feel pretty aggrieved on 26 minutes when Van Persie, who was a yard offside, latched on to Daley Blind's ball to fire past Mark Schwarzer.
But they could have no complaints about the second, five minutes later, as Angel Di Maria was afforded too much space and his shot was bundled home by Falcao after Schwarzer's initial save.
Morgan then compounded his side's misery a minute before half-time when he headed the ball into his net from a United corner.
City were much-improved in the second half and, while a comeback never seemed likely, they did grab a late consolation as Marcin Wasilewski scored his first goal for the club, heading home Marc Albrighton's cross.
Pearson had clearly seen enough from the side that started in the FA Cup victory at Tottenham, with Liam Moore, who limped out after 20 miserable minutes at White Hart Lane, the only player not to start at Old Trafford.
That meant a first Premier League start for the club for goalkeeper Mark Schwarzer, chosen ahead of Ben Hamer, and for Andrej Kramaric.
United quickly imposed their authority on the game but, despite an almost total dominance of possession, they struggled to break City down.
But the visitors were their own worst enemy, seemingly unable to string a handful of passes together before giving it away and inviting pressure back on themselves.
The initial warning signs came on 16 minutes when Van Persie playing in Falcao into the box, only for the danger to be averted by the sliding frame of Wasilewski.
Those warnings were left unheeded, though, as Blind's long ball over the top found Van Persie, in behind City's defence, and the Dutchman fired right-footed into the far corner.
City's defenders pointed in desperation to the linesman but their complaints were ignored despite replays showing Van Persie was a clear yard offside.
The goal seemed to shake City, who found themselves two goals down just five minutes later.
Van Persie turned provider, feeding Di Maria down the left in acres of space. Schwarzer did well to get down to his left to beat away the initial shot, but could only parry it back into the six-yard box and, despite the efforts of Danny Simpson and Wasilewski, Falcao was on hand to bundle the ball home.
What began as injustice, turned quickly into a procession and City's dismal half was encapsulated when Morgan headed past his own goalkeeper on the stroke of half-time.
Esteban Cambiasso replaced Jamie Vardy at the break as Pearson rearranged his pack into a 4-1-4-1 formation.
And to their credit, City improved greatly in the second half. How much of that was down to United taking their foot off the pedal is open to debate, but the response was certainly admirable.
Kramaric and Leonardo Ulloa were replaced by David Nugent and Marc Albrighton on the hour as it looked like Pearson was content to get out of Manchester just the three goals down.
But both substitutes had an attacking impact as Nugent pounced on a poor back pass from Phil Jones but was denied by an alert De Gea, before Albrighton played a key part in City's consolation.
His superb cross was met by Wasilewski at the back post, who nodded home for his first goal in a City shirt.
Not only did it add a semblance of respectability to the scoreline, it also kept City's record of not being defeated by more than two goals this season intact.
Teams:
Manchester United: (4-4-2) De Gea, Valencia (Mata - 77'), Jones, Rojo, Shaw, Blind, Januzaj, Di Maria, Rooney, van Persie (McNair - 68'), Falcao (Wilson - 80')
Subs not used: Valdes, Smalling, Fellaini, Herrera
Leicester City: (4-2-3-1) Schwarzer, Simpson, Wasilewski, Morgan, De Laet, Drinkwater, King, Vardy (Cambiasso - 45'), Kramarić (Albrighton - 62'), Schlupp, Ulloa (Nugent - 62')
Subs not used: Hamer, Konchesky, Upson, Hammond
Referee: Martin Atkinson
Attendance: 75,329