Portsmouth are unlikely to delve into the market, but have the option of signing free agents outside the window should they require any additional depth or cover.
But which players are available as free agents? We take a look at some of the exciting options that Kenny Jackett could yet pursue should he wish to seek new recruits:
9. BRADLEY WRIGHT-PHILLIPS
Largely unproven in the English leagues, Wright-Phillips has an eye-catching record in the MLS - and is now a free agent after leaving New York Red Bulls. Could a return to home shores prove appealing? Photo: Maddie Meyer
10. BREK SHEA
Injury has hampered the development of the former USA international but, fresh from a spell with Atlanta United, Shea is ready to work his way back into the game. Photo: Alex Menendez
11. VICTOR ANICHEBE
A highly unlikely option, given he seems in no hurry to return to competitive football, but Anichebe is still technically a free agent. He trained with Doncaster Rovers earlier this season. Photo: Michael Regan