Goalkeeper Will Norris became the first arrival at Fratton Park as he penned a three-year deal with the Blues.
He was soon joined by central defender Conor Shaughnessy, who completed a free move from Burton – signing a two-year deal.
Indeed, 18 names have been linked with a switch to PO4 as John Mousinho continues his preparations for a busy period in the market.
With players being continuously tipped with a move to the south coast, we’ve taken a look at how Pompey could line-up if the rumours were true.
Here’s how they would shape-up.
1. What Pompey's starting XI could look like
From left: Tommy Leigh, Gavin Whyte, Connor Ogilvie and Kusini Yang. Photo: National World
2. GK - Will Norris
The 29-year-old became the first signing of the summer - penning a three-year deal at Fratton Park. The Blues have also been linked with a return for Matt Macey, but it remains to be seen whether they will pursue a move for the Luton stopper following the arrival of Norris. Photo: Portsmouth FC
3. RB - Joe Rafferty
The right-back was outstanding following his return from injury in February and started every game when available under Mousinho. He adds plenty of experience to the side and will expect a fight with Zak Swanson when the youngster returns from injury next term. Photo: Jason Brown
4. CB - Conor Shaughnessy
The centre-back became signing number two on the opening day of the transfer window as he penned a two-year deal with a club option of a further 12 months. He arrived on a free transfer after departing Burton. Photo: Portsmouth FC