"There was a period where a lot of club chairmen got enamoured by top players and made them managers at Premier League level virtually the very next day," said Ferguson.
"They all have teams who are respectable in terms of both performance and the positions they have got themselves into.
"Certainly Harry has loads of experience and I think you can expect improvement from Portsmouth this season."
Ahead of tonight's clash, Ferguson added: "Fratton Park is not an easy place to go to.
"It means Portsmouth have a big advantage overall in terms of their likely home record.
"Harry has made a few interesting additions too, especially Muntari, who we have watched quite a bit. He actually came over to us as a kid along with Michael Essien but at the time we couldn't do anything because of the work permit situation."