Pompey are targeting keeping Greg Halford for the remainder of the season.
Steve Cotterill has been in touch with Wolves boss Mick McCarthy over extending the versatile defender's loan move.
As it stands, Halford is scheduled to return to Molineux after the January 3 fixture against Hull.
Pompey are eager to retain him longer following the 26-year-old's impressive displays since joining in October.
Halford is currently training with Wolves after being caught up in the weather on his return to Birmingham at the weekend.
And Cotterill is keen to ensure the ex-Colchester man remains at Fratton Park until the end of the campaign.
He said: 'I have dropped Mick McCarthy a message just to see where he is with Greg.
'I think he wants to stay, and at the moment he is back with Wolves this week rather than training with us.
'It took him 11 hours to get home to Birmingham the other day.
'As it stands, Hull is his last game, but hopefully we can extend it a bit more.
'Ideally, I'd like it to be for the rest of the season if possible.
'That is down to Mick and where his thoughts and theories are for Greg. We are in his hands a little bit.
'I think he's done very well. I like the way he can bring in flexibility.
'Sometimes that is what has hindered him, really. For a young man he has had quite a few clubs.
'He has not quite held down a position – his flexibility has gone against him on occasions – but in a squad the size of ours he has a major role.
'I don't mind where he plays as long as he is happy and enjoying himself.
'I think then we will see Greg play his best football.
'We are very much in Mick's hands so will just have to wait and see.
'I know he has had a few injuries himself to contend with in his squad.'
Pompey already have Ibrahima Sonko and Carl Dickinson on season-long loans.
Additionally, Liam Lawrence is currently an emergency loan – a period which ends before the December 28 visit to Leeds.
However, that will become a permanent deal on January 1.
Their displays, along with fellow loanee Halford, have drawn praise from Cotterill.
And he believes the quartet have played crucial roles in the team's progress this season.
He added: 'We are actually half a team of loans.
'They have done well along the way, they have all played their part.
'We are delighted with all of their contributions, they haven't let anyone down.'