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.
5. Duane Holmes
Trained at Pompey under Paul Cook in 2016 but a deal was never completed and he's now with Preston after time spent with Derby and Huddersfield. | PA
6. Gareth Evans
The mysterious 'Wayne Evans' appeared at Hawks in 2015 and went on to become a huge Fratton favourite. | Graham Hunt/ProSportsImages/PinP
7. Denilson
Pompey handed Brazilian winger Denilson a trial in 2006. However the one-time world's most expensive player, when he signed for Real Betis for £21.5m, couldn't agree a deal with the club and went to Saudi Arabia. | AP
8. Aaron Jarvis
Aaron Jarvis trialled with Pompey in 2019 - didn't make a mark and ended up in Scotland with Falkirk. Made five appearances for non-league Torquay during second half of last season. | The News