But that doesn’t mean there isn’t opportunities for Pompey and their rivals to bolster their squads.
There are still a stack of free agents who are looking for new clubs after their contracts came to a close this summer.
There’s one or two surprising names on the lookout for employers with the season up and running.
We’ve looked at the kind of players who could realistically be within Pompey's reach, or those who could yet be picked up by their League One rivals.
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13. Kadeem Harris
Strictly speaking ended the season as a League One player after Sheffield Wednesday's relegation, but there's been Championship interest and was training with Reading Photo: Steve Ellis
14. Kean Bryan
Nearly joined Pompey on loan, the defender is now looking for a club and has Championship interest Photo: Simon Bellis
15. Hal Robson-Kanu
Released by West Brom the veteran striker has yet to find a new club this summer. Photo: John Walton
16. Dan Crowley
Been at Cheltenham after his Birmingham exit, but the Robins couldn't get a deal over the line Photo: Pete Norton