Pompey have picked up some gems after trial periods down the years, but the Blues have also let some players through their grasp who have gone to have monumental careers in the game.
Here’s a list of some of the most famous - and infamous – triallists from the club’s history, along with some names which may catch you by surprise….
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10. Ryan Bird
Non-league man made his mark at Hawks in 2013 - and earned himself a deal Photo: ian hargreaves
11. Dragisa Binic
Incredibly turned up on Pompey in trial on 1992 - a year after winning the Champions League with Red Star Belgrade alongside a certain Robert Prosinecki! Photo: AFP
12. Berlin
Another famous triallist from 2006 who popped with a goal Torquay, sparking debate over his identity. Photo: The News