Goalkeeper: David de Gea
The Spaniard now started as goalkeeper in the last eight games for United, and seems to have established himself as first-choice ahead of Anders Lindergaard. There is no reason to expect that De Gea won't play against Liverpool.
Right-Back: Rafael da Silva
Ferguson has been known to play the likes of Chris Smalling at right-back against more defensively taxing opposition, but increasingly he is showing faith in Rafael da Silva, who has showed more maturity this season.
Having the hard-working Antonio Valencia in front of him, makes it easier for Da Silva to get forward, without worrying about getting caught out, and the Brazilian should be an important offensive outlet against Liverpool.
Left-Back: Patrick Evra
Evra may be well past him best, but United's new left-back Alexander Buttner looks nowhere near ready to replace him. All eyes will be on Evra's tussles with Luis Suarez, following their issues last season.
Centre-Back: Nemanja Vidic
Vidic has been nursed back to fitness over the Christmas period, being regularly rested to avoid a re-occurrence of his knee injury. With a full week of rest between the 2-2 draw with West Ham and Sunday's game with Liverpool, Vidic should be ready and able to play again.
Centre-Back: Rio Ferdinand
Since Vidic's return to action he hasn't yet been paired with Ferdinand. Both Jonny Evans and Chris Smalling have had plenty of starts of late, but now is the time for the return to one of United's best ever central defensive partnerships.