The victory was sweeter for United mad Holt than many of his team-mates.
The Stockport-born defender told The Sun: "I was at Old Trafford last Sunday to watch United beat them 3-2.
"If you watch a video of the match, I was one of the 70,000 home fans cheering Dimitar Berbatov's hat-trick!
"I was also on a scouting mission and I discovered plenty of weaknesses in the Liverpool team.
"Unfortunately they played virtually a different team against us.
"But we knew we could cause them problems at set-pieces and we managed to do that.
"And, as a United fan, let me tell you, there is no nicer way of beating Liverpool than on penalties at the Kop end. Perfect."