Guy Whittingham is closing in on a new loan recruit.
And the caretaker boss is hopeful a move can be completed before the weekend.
Whittingham has at present two free spaces in his squad, which is restricted to 20 players.
He has earmarked those to be filled by a striker and central defender on loan.
Rumours of an approach for AFC Wimbledon’s Christian Jolley have already been ruled out by the former first-team coach.
Although he is seeking out a number of targets in time for Saturday’s visit of Doncaster.
Whittingham said: ‘Hopefully we will know more by today. We are working hard.
‘Luke Dowling has contacts, Awfs has contacts and I’ve got contacts. We’ve all got contacts.
‘There are three or four things out there and you hope that one will come off.
‘Hopefully we can get one in before Saturday’s game with Doncaster Rovers.’
The need for a partner for Izale McLeod has never been more pressing, considering the current goal drought.
The Blues have not scored in the past 399 minutes of first-team action.
However, Bournemouth boss Eddie Howe has ruled out a return for Wes Thomas, who was in the Pompey team the last time they scored against Stevenage (October 23).
In addition, Whittingham wants an experienced centre-half to challenge Gabor Gyepes and Lubomir Michalik.
Josh Thompson has already gone out on loan to Colchester to create that space.
Talks with Ricardo Rocha are continuing, although Whittingham has said it may be January until that potentially comes to fruition.
The only cover he has is Johnny Ertl, who filled in during the second half of the Bury defeat after Gyepes went off ill.