Rooney created both of Van Persie's goals on the night.
It was a very satisfying contribution from both men as they were named in a United starting line-up for the first time.
"The best quality both of them have is that they can turn a game," said Ferguson.
"That is an important feature. It doesn't really matter if they have a personal combination, it is their ability to finish moves off, whether it is through (Tom) Cleverley, Nani or (Antonio) Valencia.
"We have a pair of really top players who can finish and change a game."