Steve Cotterill is still keen to send Nadir Ciftci out on loan.
The Pompey boss believes the teenage talent has lost fitness sitting on the bench in recent games.
But Cotterill feels he can't send Ciftci out to get first-team football under his belt until he has brought in more experienced replacements.
The Blues manager turned to the 18-year-old with Pompey's squad woefully short on depth at the start of the campaign.
Ciftci responded with a string of impressive performances despite his lack of experience, grabbing a couple of goals along the way.
The Dutchman has taken a back seat following the arrival of Liam Lawrence from Stoke.
That has meant Ciftci has started just one of Pompey's past 12 games.
Cotterill wants the player to gain some sharpness again by picking up first-team experience elsewhere.
But the Pompey manager feels he won't be able to do that until he has been given the green light to bring in some extra cover.
Cotterill said: 'Whenever an injury kicks in it's a problem for us.
'We have to change our system or we're down to just our young boys coming on.
'If anything happens to our wide men, we're down to Nadir Ciftci.
'All of a sudden Nadir hasn't played for a couple of months, and he would have lost fitness without a shadow of a doubt.
'We need him to go out on loan for a month, run around and get his fitness.
'That's what I want to do, but we haven't got that luxury.'