Pompey will face stern competition in the race for promotion, with a number of their third tier rivals having already completed some eye-catching deals – which could prompt some worry. Scroll down and click through the pages to see EVERY deal completed in League One this summer so far:
13. Lincoln City
In: Jack Payne (Huddersfield Town), Joe Morrell (Bristol City - loan), Jorge Grant (Nottingham Forest)
Out: None Photo: Laurence Griffiths
14. MK Dons
In: Hiram Boateng (Exeter), Brennan Dickinson (Colchester), Ryan Mason (Wolves), Regan Poole (Manchester United), Jordan Bowery (Crewe), Laurie Walker (Hemel Hempstead Town)
Out: Ryan Watson (Northampton), Mathieu Baudry (Swindon Town), Chuks Aneke (Charlton Athletic), Ousseynou Cisse (Gillingham) Photo: Pete Norton
15. Oxford United
In: Kevin Berkoe (Wolves), Sam Allardyce (Bury), Tariqe Fosu (Charlton Athletic)
Out: Charlie Raglan (Cheltenham), Curtis Nelson (Cardiff City) Photo: Julian Finney
16. Peterborough United
In: Mark Beevers (Bolton), Serhat Tasdemir (AFC Fylde), Frazer Blake-Tracy (King’s Lynn), Christy Pym (Exeter), Dan Butler (Newport), Mo Eisa (Bristol City), Niall Mason (Free Agent)
Out: None Photo: Ben Hoskins