Evans penned a new deal with United last week.
Ferguson said: "Jonny Evans form been fantastic. You recognise the maturity now, he's 23 years of age. The last couple of years he has really blossomed.
"That what you expect from a player of his ability. He has got the ability to be really top drawer. We are now seeing that. What we need to look at is what is the consistent partnership we want to give us that solidity at the back and to enjoy our game more."