At the conclusion of the 2021-22 campaign clubs across the country have unveiled their retained/released lists.
This has included a number of former Blues players - who achieved varying success at Fratton Park.
Here are the 12 players who are set to leave their current clubs for free at the end of May – including those yet to pen new deals.
9. Toumani Diagouraga – Morecambe
Years at Pompey: 2014 (loan) , Pompey appearances:8, Years at Morecambe: 2020-2022, Morecambe appearances: 101. Picture: Richard Heathcote/Getty Images Photo: Richard Heathcote
10. Kal Naismith – Luton (Still in discussions over new deal)
Years at Pompey: 2015-2018 , Pompey appearances: 94, Years at Luton: 2021-2022, Luton appearances: 68. Picture: Alex Pantling/Getty Images Photo: Alex Pantling
11. Nathaniel Mendez-Laing – Sheffield Wednesday (contract been offered)
Years at Pompey: 2012-2013 (loan) , Pompey appearances:8, Years at Sheffield Wednesday: 2021-2022, Sheffield Wednesday appearances: 19. Picture: Stu Forster/Getty Images Photo: Stu Forster
12. Elijah Dixon-Bonner – Liverpool
Years at Pompey: 2021 (trial) , Pompey appearances:0, Years at Liverpool: 2019-2022, Liverpool appearances: 3. Picture: Andrew Powell/Liverpool FC via Getty Images) Photo: Andrew Powell