Nani's well-taken opener and sublime cross for Chicharito to put United two goals ahead seemingly ended Reading's resistance, only for Jobi McAnuff to ensure a nervy final few minutes with a poached finish.
"It ended up a really good tie. When they got their goal, they went for it," admitted Ferguson. "They hurled the ball into the box, hoping to get that vital touch. But we withstood that. And I think when you analyse it, we played some great football.
"We could have scored a lot of goals tonight. We made some chances - we had shots blocked, the goalkeeper's made some saves, I'm really satisfied with the quality of the game. We really should have punished them better."