The Blues have identified the middle of the park needs strengthening after the poor start to the League One campaign.
Kenny Jackett's not satisfied how Tom Naylor and Bryn Morris have looked as a pair so far and instead looking for a fresh face.
Work’s presently going on behind the scenes to find that player as Pompey look to finally light the touchpaper to their campaign.
The Blues were linked with ex-Aston Villa man Jake Doyle-Hayes earlier this week.
But we’ve taken a look at some of the other engine-room operators who could potentially fit the bill...
13. Jamie Bowden - Tottenham Hotspur
The England youth captain was reportedly wanted by a host of Championship and League One clubs earlier this summer. Bowden is England youth international and travelled with Spurs for their Champions League quarter-final win at Manchester City last year. Currently injured, however. Photo: Steve Bardens
14. Jake Doyle-Hayes - free agent
The Republic of Ireland youth international was linked with Pompey earlier this week. Impressed on loan at Cheltenham last season before being released by Aston Villa Photo: Stu Forster