Today marks the first day of the transfer window, with League One clubs having the rest of the month to complete deals they believe are necessary.
It represents an opportunity for all 24 sides to strengthen and bolster their ambitions for the remainder of the season.
Pompey are currently targeting a box-to-box midfielder who's capable of replacing the influential Andy Cannon should he pick up an injury.
But what positions and players are the Blues’ rivals aiming to sign throughout the window? And which teams could see key men be prised away by potential suitors?
Scroll down and click through the pages to see what likes of Sunderland, Ipswich and Hull have planned...
13. Lincoln City
Michael Appleton is looking to make an early signing, admitting 'he's fairly confident that something might happen soon, in the first week'. Key-midfielder Jorge Grant has been linked with the Championship although Appleton doesn't see him leaving. Photo: Daniel Chesterton
14. MK Dons
Russell Martin revealed he wants to sign 'a couple of players at the top end of the pitch to help us out, and someone out wide who can get at people one-on-one and help us with pace which will change the dynamic of our attack a lot'. The Dons are expected to see Carlton Morris recalled to Norwich. Photo: Nigel Keene
15. Northampton Town
Keith Curle will make signings if he can improve his current squad. He revealed January is 'about the availability of players because you don't just go shopping in January, your work is done before that'. The Cobblers recently signed free-agent Lloyd Jones. Photo: Pete Norton
16. Oxford United
Last season's beaten play-off finallists are 15th and performing below expectactions. Karl Robinson's admitted his sie 'still want four players and I’ve never changed that'. The U's have also been linked with Luke Thomas as well as Scotland international Chris Cadden. Photo: Graham Hunt