Sir Alex is determined United will keep calm in the Anfield cauldron on Saturday and finish the game with 11 men on the pitch. Sendings off have seriously hindered the Reds' hopes in recent years and the manager has also acknowledged Liverpool's improvement under Kenny Dalglish.
"In my time, we've had about nine players sent off in games there which is unusual for Manchester United," declared the boss. "That is down to the atmosphere which can be created there. It's something you have to deal with.
"Last season, we were playing really well in the game and made two really bad errors to give the goals away. It was hard to overcome that. In the previous two seasons, we had players sent off. There are issues you have to deal with - your temperament and composure in these situations to make sure you handle these sorts of things."
Dalglish will bid to outdo his old adversary with the two Scots on the touchline again this weekend.
"He's what the fans wanted and I think there has been an improvement," added Sir Alex. "They've bought a lot of players. They've gone for it financially and the owners have supported Kenny very well. At the end of the day you would always expect Liverpool to be challenging at least for a Champions League place."