Ferguson only interested in what Posh can do as managerless Pompey head to Weston Homes Stadium
Instead, the Posh boss's focus is on what his team can bring to the party, knowing that if they play to their potential then they can get the three points they crave to maintain their push for automatic promotion.
Pompey will be under the supervision of caretaker boss Joe Gallen for the trip to Posh, with Kenny Jackett having been sacked from a role he had held for almost four years on Sunday.
After a poor run of results in Sky Bet League One, Pompey were beaten by league two side Salford City on penalties in the delayed 2020 EFL Trophy Final on Saturday, having drawn 0-0 after extra-time.
That was the final straw for the powers-that-be at Fratton Park, and it does mean there could be changes to the line-up and playing system on Tuesday, but Ferguson is not worried by whatever the visitors throw at them.
"I have had an idea of what we will do, what personnel we will use and what formation we will play against Portsmouth," said the Posh boss.
"We have had plenty of time to look at them, watched them on Saturday in the final, and unfortunately Kenny has now gone, but my focus was always going to be on us.
"We will work on what we need to do, and I know what I am going to do, but again we will have other options to go into with personnel and also formations."
On the possibility of Pompey changes, he added: "My main focus is always on us and the players know that, but obviously we do look at the opposition in terms of their strengths and where they can hurt us.
"We will do the same for this game, but the main focus is going to be about what we do with the ball. Sometimes there is nothing wrong with that, and I think this is a game like that.
"If I go on about Portsmouth too much, which I won't, or if I say they could do this, they could do that, it can confuse the players, because sometimes too much information does that.
"So I will keep it simple, we will go through the team, go through the set-pieces and prepare as normal."
A win for Posh will see them move back to within three points of leaders Hull City, who are without a midweek game. and they will also have two games in hand.