Dion Donohue admitted he won't rush his latest return from injury.
The midfielder has been out of action since he picked up an abductor injury during Pompey's 2-2 draw with Burton on October 23.
Donohue was substituted halfway through the first half after being accidentally caught by team-mate Jack Whatmough.
It was initially thought the Welshman had suffered a dead leg, but a scan the following day showed he had suffered a grade two tear.
The former Chesterfield ace was only four games into a return to first-team action after groin and hamstring problems ruled him out for the first two months of the season.
He was 'back out running' this week as he stepped up his recovery and has targeted a return to full-time training next week.
However, speaking to Express FM, Donohue said he would adapt a more careful approach this time around in a bid to ensure his latest comeback wasn't cut short again.
He said: 'I've been back out this week running so hopefully it's not too long now (before returning).
'It will probably be the back end of next week, but I certainly don't want to rush anything because of the injuries I've already had.
'The last thing I want to do is go in and go back out with another injury, so I've got to make sure I'm 100-per-cent right.
'Also, I need to get that match fitness back, so I'm sure there will be a lot of games behind closed doors I have to be involved in first.
'But, as I said, I'm looking forward to getting back.
Donohue scored the winner for Pompey against Crawley in the Checkatrade Trophy when he made his first appearance of the season on October 9.
He featured in the Blues' next three games, before pulling up against the Brewers.
And Donohue admitted his latest setback has been tough to take.
'It's been very frustrating, especially the latest one as I obviously missed the first two months of the season,' he said.
'To get back into the side and then obviously do so well, it was a good thing - I think when I came in I played quite well for the four games I was involved in.
'So, obviously, to pick this injury up is very frustrating and it was a tough one to take, really.'