Shaun Williams makes his competitive Pompey debut in this evening's Carabao Cup tie at Millwall.
He replaces Lee Brown in one of three changes from the side that beat Fleetwood in the league on Saturday, meaning Connor Ogilvie can switch back to his regular left-back position.
The other switches see Callum Johnson and Reeco Hackett-Fairchild come into the line-up, with Kieron Freeman and Marcus Harness making way.
Pompey: Bass; Johnson, Raggett, Robertson (c), Ogilvie; Tunnicliffe, Williams; Hackett-Fairchild, Gassan, Curtis; Marquis
Subs: Bazunu, Freeman, Mnoga, Brown, Jacobs, Harness, Hirst