A Wayne Rooney goal was enough to hand United all three points, but the match also included a floodlight failure, a clearance off the line and the woodwork being struck five times in the first half alone.
Ferguson praised the quality of the game as a whole and believes that his side deserved to come away with the win.
"We had so many chances. It was a terrific football match and it was an excellent result, and I'm very pleased for us," said the Scot.
"They had some great chances. Our keeper [David De Gea], Jonny [Evans], Rio [Ferdinand] were terrific and we had a few chances ourselves, the second half in particular. In the first half we hit the woodwork three times but we deserved to win.
"They have had a great home record over the years and it is a very important result for us. It's a good position [we are in] we are pleased. Tonight you can look at the performance of the players. They put their bodies on the line, blocking shots, great headers out of defence, really determined effort by the players."
United now sit 10 points clear at the top of the Premier League table, although nearest rivals Manchester City have a game in hand.