Manchester United head into the Manchester derby on the back of a wave of inconsistent form.
The Red Devils looked imperious in their 3-0 win over Everton last Saturday but were exposed in their hammering at Arsenal a fortnight prior.
The draw at CSKA Moscow in midweek has done little to boost the confidence surrounding their game with City as nobody knows quite what Man United side will show up on the day.
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Much debate has been made over what United's most effective attacking quartet is, but if the Red Devils are to secure their second straight home win against Manchester City there is one midfielder who must be in the starting XI.
Morgan Schneiderlin was dropped for the trip to the Emirates and it proved to be a disastrous decision from Louis van Gaal as United were given a 90-minute runaround.
The duo of Michael Carrick and Bastian Schweinsteiger were woefully exposed and, as Gary Neville put it, the German World Cup winner was treated like a dog.
While Van Gaal is a fan of rotating the players in his squad, the Frenchman is arguably the best defensive midfielder in the Premier League right now - along with Francis Coquelin - and was brought to the north-west for this kind of fixture.
His performance at Goodison Park was outstanding. Happy to sit in front of the back four, he offered a foundation for United's more creative players to shine while he also nullified the threat of Ross Barkley. The goal was an added bonus.
This is exactly what was missing in north London as the Red Devils were overrun by the quality of Cazorla and Mesut Ozil.
Manchester City possess incredible talent; either Kevin de Bruyne or Raheem Sterling are expected to start behind Wilfried Bony, and both players have the ability to dissect the opposition if given space.
Having seen his side dismantled at the Emirates, surely Van Gaal won't make the same mistake again. Schneiderlin should be the first name on his teamsheet.
Do you agree; Is Morgan Schneiderlin key to Manchester United's chances against Manchester City? Have your say in the comments tomorrow!