More recruits are in the pipeline as Andy Awford revamps his Pompey squad.
But the Blues boss has warned not all his signings will be in place for the start of pre-season.
Paul Jones put pen to paper on a three-year deal on Wednesday to fill one of his two goalkeeping spots.
He joins Danny Hollands and Nicky Shorey in committing themselves to the Blues under boss Awford.
Strengthening is still required, in particular in the centre of midfield and up front, as he builds on the nucleus of a decent squad.
Meanwhile, John Sullivan’s exit is being negotiated and David Connolly’s future at the club remains in doubt.
Pompey’s pre-season begins on Thursday, June 26 – a week earlier than usual.
But Awford insists his squad will not necessarily be complete by that point.
He said: ‘I am pleased with how it is going – things are progressing well with the squad.
‘We have lots of targets and we’re talking to them. We are still on the A list.
‘Obviously we are hoping we can get these over the line as soon as we can but it is something we are relaxed about.
‘I don’t think all the signings will be completed before we get back for pre-season. Some will be during.
‘We’ve got three signings in already and are closing in on some more. I’m really pleased with how it is going.
‘Sometimes a breakthrough can happen late one night and the player signs the following day, it can be that quick.
‘So we’re taking it as it comes and continuing to speak to a number of targets we feel can strengthen our squad.’
As revealed by The News yesterday, the Blues are attempting to come to a mutual agreement with Sullivan to leave with 12 months of his contract remaining.
Talks are also planned with Connolly over his future now his loan spell at Oxford has come to an end.
The 37-year-old has 12 months of his deal remaining and it must be clarified whether he can be part of the club moving forwards.
Meanwhile, negotiations with Jed Wallace are continuing over a new contract.