Andy Barcham has suffered a setback in his bid to return from injury.
The winger has recently been sidelined with a groin problem and was expected to make his comeback in the reserves this week.
The fixture with AFC Wimbledon was scrapped on Tuesday morning due to the ongoing wet weather.
However, Barcham was also a late withdrawal following a recurrence of his groin complaint.
The 27-year-old has now been signed off for two weeks before the Blues’ medical staff again attempt to rehabilitate him.
It means once more he is ruled out of the reckoning as Pompey travel to Tranmere tomorrow looking to end their away-day hoodoo.
Andy Awford said: ‘Andy has been sore and we have managed it, he was down to play in a reserve game on Tuesday.
‘We picked the team on the Monday and when I got in on the Tuesday morning there it was, Andy couldn’t be involved.
‘His groin was sore. We decided to leave him out of the reserve game and assess him again and it was worse than what we thought.
‘He is now on two-week shut down to allow it to get better.
‘But Adam Webster is fit and will play for 45 minutes in the next reserve game, hopefully next week.
‘And Joe Devera is now back in training.’
Barcham has not made a Pompey appearance since the Johnstone’s Paint Trophy defeat against Northampton Town on October 7.
During that time he has only twice made a Blues match-day squad as his groin problem has ruled him out of action.
His ongoing absence ramped up the importance of Awford bringing in another winger – culminating in this week’s loan deal for Lee Holmes.
Now Holmes will challenge Ricky Holmes, Jed Wallace and Miles Storey for the wide spots in the 4-4-2 system he is currently favouring.
Meanwhile, Devera was another earmarked to play for the reserves against AFC Wimbledon before its cancellation.
Yet, despite unable to receive match action on that occasion, he is available for tomorrow’s clash with Micky Adams’ side.
The versatile defender has come through training this week and is vying for a place on the bench at Prenton Park.
Webster is another back from injury to put himself in the reckoning, although tomorrow may be too soon.
The 19-year-old hasn’t played since the start of October.