Josh Passley will be given the chance to nail down the Pompey right-back spot during his loan spell.
The Fulham defender arrived on a one-month youth loan on Thursday and was expected to go straight into the Pompey side for today’s League Two trip to table-topping Wycombe.
Adam Webster has filled the role for the past five games but boss Andy Awford believes he is better suited to a central defensive role.
Matt Fish, Joe Devera and Alex Wynter have also been used at right-back this term, but Awford felt the position needed a specialist.
‘It’s an area that we have never really nailed,’ said Awford.
‘We’ve had Alex Wynter, Joe Devera, Matt Fish and then Webbo (Webster) recently. That is too many.
‘Webbo has done alright recently but he is a centre-half so am I doing him a disservice playing him at right-back all the time?
‘Josh is athletic, he’s attacking, he’s young and he’s got good energy.
‘He’s not an experienced pro but he is a right-back and I felt we needed that.’
Awford sought the views of his old centre-back partner, Kit Symons, who is now Fulham boss, and also spoke to Shrewsbury manager Micky Mellon after a recent loan spell.
Awford said: ‘Kit likes him. It’s a big jump from development football to the Championship.
‘He went to Shrewsbury and I spoke to Micky Mellon, who spoke very well about him, too. So we will have a look at him for a month and then take it from there.’
Meanwhile, young Blues forward Brad Tarbuck has joined Southern League outfit Dorchester Town on a month’s loan.
Miles Storey, whose loan spell with Pompey ended recently, has joined League Two rivals Newport County on loan from Swindon.