Despite having an extra man following Jonjo Shelveyâ€™s 39th minute red card, the Red Devils conceded early in the second half when Reds skipper Steven Gerrard fired his side ahead.
But Sir Alex Fergusonâ€™s men rallied to level via Rafaelâ€™s brilliant curling effort five minutes after the opener before Robin van Persie won the game with a late penalty but the Brazilian defender knows it was a below-par showing on an emotional day for both clubs.
â€śBoth clubs have a great history and we had to respect that, then we got the three points, which is so good for us,â€ť said Rafael.
â€śIt wasn't a great performance from us but in the last five years we haven't won here so we're very pleased.
â€śRobin van Persie had to wait a long time to take his penalty. It might make some people anxious but he is a top player and he found the net.â€ť