Pompey still require more additions as they prepare for their latest League One promotion charge.
The Blues boss has cast his eye over plenty of triallists throughout pre-season, with Sean Goss one of the latest to arrive.
The midfielder was released by third-tier rivals Shrewsbury at the end of last season.
Goss is a proven League One performer, scoring four goals in 54 games over the past two campaigns for the Shrews.
Indeed, there are several players who featured in Pompey’s division last term still without a club.
We take a look at who could fit the bill for the Blues...
9. Niall Mason
The defender made 33 appearances for Peterborough as they clinched automatic promotion last season. Photo: Catherine Ivill
10. Kyle Vassell
The striker spent the second half of last season on loan at Fleetwood, scoring four times in 26 games. Vassell was released by Rotherham despite their relegation to League One. Photo: James Chance