The identity of our fourth-round opponents was only confirmed at around 22:20 GMT on Thursday night, with the League One side defeating Watford 2-1, after extra-time in their third-round replay.
The boss revealed to reporters that his staff had scouted a number of Tranmere matches prior to Thursday’s tie, but insisted his own team’s preparation and performance was also important.
“It's a quick turnaround anyway,” Ole said in his pre-match press conference.
“We played on Wednesday, so we hadn't prepared a lot, but, before the game yesterday, we had watched a couple of the other Tranmere games and you watched the one last night, so the opposition is the opposition, no matter what.