Some are among the highest profile names in football - both at home and on the continent.
While others are slightly less well known when it comes to their standings in the game.
But all these men have something in common - they spent periods at Pompey trying to earn themselves deals.
We’ve dug up a far-reaching list of players to appear in friendlies or rock up at the Blues training ground over the years.
13. Luis Boa Morte
The former Arsenal, Southampton, Fulham and West Ham forward came on trial towards the end of his career in 2012 but ended up with Orlando Pirates and then Chesterfield. | The News
14. Ben Davies
The former Sheffield United right-back earned himself a Pompey deal following a trial in 2015. Played more than 40 times for the Blues that season but couldn't agree new terms and left the following summer. | Getty Images
15. Eugen Bopp
Paul Hart brought Eugen Bopp to England from Bayern Munich as Nottingham Forest manager. A decade later he got the midfielder in as a triallist at Pompey | Robin Jones/Digital South
16. Heung-Min Son
A big one who got away after coming on trial in 2009. Stayed in club digs and wasn't a particularly enjoyable experience for the South Korean star. Also had a stay with Blackburn, but neither club did a deal. D'oh! | Sportimage