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.
17. Vincent Pericard
Came on trial from Juventus in 2002 and went on to earn a contract and play in the Division One title-winning side. Harry and Jim weren't at all sure about the Frenchman at first, though. | The News
18. Andre Wisdom
Former Liverpool defender Andre Wisdom featured twice for Pompey in pre-season in the summer of 2022. The defender's last club was Warrington Town. | Jason Brown/ProSportsImages
19. Frederic Brando
Came on trial in 2002 prompting a Marlon Brando-inspired quote from Harry Redknapp saying 'he could be a contender'. He wasn't. | The News
20. Elijah Dixon-Bonner
Arrived in the summer of 2021 but no deal was sealed for the Liverpool man. Has since established himself at QPR. Signed a new two-year deal with the R's this month. | AFP via Getty Images