It means there are now plenty of free agents available for absolutely nothing as Pompey plot their future recruitment.
We’ve looked at the best players that could be options for the Blues...
1. Marcus Maddison
The mercurial midfielder has been released by Peterborough, having spent the second half of the season at Hull. Maddison's got talent in abundance but will no doubt be looking to a Championship club this summer. He reportedly rejected a £1.5m switch to Charlton in January because of the wages he was offered. Photo: Ker Robertson
2. Armand Gnanduillet
The striker has turned down a new deal at Blackpool after bagging 18 goals in 36 appearances this season. Gnanduillet is reportedly a target for Championship side Cardiff and will want a crack at the second tier. Photo: Alex Livesey
3. Jordy Hiwula
The forward has been released by Coventry after clinching the League One title. Hiwula has bagged 17 times in 71 appearances for the Sky Blues since his arrival for a six-figure fee from Huddersfield in 2018. Two of his goals have been against Pompey. Photo: Robin Jones
4. Alex Woodyard
The midfielder has been allowed to depart Peterborough. Woodyard was a regular at the Posh last season before slipping down the pecking order. He joined Tranmere in the January window and was key as they started to claw their way out of a relegation battle before the season was curtailed. Photo: Alex Pantling