Here are 10 of the early contenders being touted to link up with Kenny Jackett's squad.
Pompey along with Hull and Fleetwood said to be interested in the 20-year-old Cardiff full-back. Central defender is highly regarded at Coventry but is out of contract and set to leave. Championship clubs like Hull and Derby also said to be keen. Kenny Jackett has made it clear he's interested in a move for the out-of-contract Birmingham man, who's been on loan at Fratton Defender is sought after as he leaves Bristol Rovers and Kenny Jackett is keen - but so are Championship clubs A player Pompey have watched in the past. Hasn't featured at Sheffield United and could be a loan option. Spent time training with Pompey last season and reputation has grown with Lincoln this term. Another defender who will be a free agent this summer after leaving Blackburn. Has featured on loan at Doncaster. A year left on his deal at Birmingham but four goals in eight starts made him one of the more successful January signings Another defender Pompey are said to be keeping tabs on, but Scottish giants Rangers also like the Oldham man Powerful defender is leaving Plymouth and Fratton Park is being touted as his destination