Although Brendan Rogers’ side lie in in eighth spot, 21 points adrift of Manchester United, the Reds boss knows how tight contests between the sides can be.
“Derby games are very tricky affairs – they always have been,” Sir Alex told reporters at his pre-match press conference.
“I'm quite happy to play badly and win this one!”
At any rate, playing well is no guarantee of victory when it comes to tussles with the men from Merseyside.
“Last year we outplayed them in the FA Cup game at Anfield and lost 2-1. You sit there at the end of the game and say to yourself: 'How did that happen?'.
“Derby games are like that, although hopefully this time we play well and win. With the form we're in, we're going into it in the right frame of mind. But Liverpool will always be difficult to beat.”
Liverpool go into Sunday’s match at Old Trafford on the back of a controversial FA Cup win last weekend at Mansfield Town. Striker Luis Suarez clearly handled the ball in the build-up to his side’s second goal but played on regardless, despite fierce protests by the home team.
Sir Alex didn’t see the match but sympathised with the officials who missed the incident.
“When you play a game of football you always hope you don't get a bad break against