The sheer number of triallists present at Westleigh Park meant there was plenty of detective work going on to try to work out the identity of those players.
In total, there were nine faces not under contract with the Blues all trying to win deals.
Before kick-off, we identified the likes of Jake Hesketh, hat-trick hero Gassan Ahadme and former Doncaster midfielder Madger Gomes.
Meanwhile, eagle-eyed fans have shrewdly managed to work out the names of the others Danny Cowley is presently running the rule over.
It’ll be interesting to see how many stick with Pompey as they travel up to St George’s Park today for their training.
Scroll down to see the names of the players that featured against the Hawks.
5. Madger Gomes
As reported, the midfielder has linked up with Pompey after his release from League One rivals Doncaster. He made 55 appearances in the past two years at the Keepmoat and played for Liverpool and Leeds earlier in his career. Photo: Kieran Crooks
6. Jay Mingi
The centre-midfielder was one of the most impressive triallist. Mingi came through the ranks of West Ham's academy before joining Charlton last summer. The 20-year-old made two appearances for the Addicks - both in the Papa John's Trophy - and scored in a 1-1 draw with Brighton under-21s. He was released earlier this summer by the Addicks. Photo: Adam Davy
7. Layton Ndukwu
The midfielder graduated through Leicester's academy before his release at the end of last season. The 22-year-old is a former England under-17 international and had a loan spell at Southend during the first half of 2019-20, making 10 appearances. Photo: Paul Collins
8. Jayden Reid
The winger spent time with Man Utd and Swansea as a youngster before joining Birmingham in 2019. The 20-year-old made four Championship appearances for the Blues in 2019-20. Last term, he spent the first half of the season on loan at League Two Barrow before switching to Walsall in January - but played once before returning to St Andrew's early. He signed off his Brum career by helping their under-23s win the final of the Professional Development League before being released. Photo: George Wood