Michael Appleton believes Pompey will face the strongest squad in the Championship tomorrow.
Appleton reckons his men will be taking on a Leicester side who have the greatest playing resources in the division.
The Foxes owners have already spent big since arriving at the King Power Stadium.
And they will again loosen the purse strings in January.
Appleton admitted some jealously at the financial weight given to boss Nigel Pearson.
He said: ‘The quality of their players makes them arguably the strongest squad in the division.
‘You only have to look at the players they can afford to keep on the bench – that tells you that.
‘I looked at their bench at Fratton Park and there were match-winners there.
‘The rest of us in the Championship aspire to have a squad of that type.
‘You want people on the bench who can come on and win games.
‘You want people in the stand who can win you a game a couple of weeks down the line. I’m probably in envy of them – and a lot of other clubs – in terms of what they can do financially.
‘I’m a little concerned they have not quite gelled.
‘My biggest concern is they will kick in at some point and start climbing the table.
‘I expect them to do that – just after tomorrow.’
Appleton knows Pearson well after they served together on the coaching staff at West Brom.
He feels there will be plenty of expectation placed on him now he has rejoined the Foxes.
Appleton said: ‘They are a strong team with a good midfield which likes to play narrow with attacking full-backs in Lee Peltier and Paul Konchesky.
‘I’m sure there is pressure on them because it’s a big club who have been backed by their owners.
‘There will be a pressure on Nigel to get them out of the division. I’m sure that’s wanted this year but, if not, next year they will want to do that considering what they’ve spent.’