The Blues boss ranks the current injury and unavailability the worst he’s know in his time at Fratton Park, with a huge swathe of key players sidelined.
Mousinho faces a test to put out a competitive side against Kieran McKenna’s men, with Conor Chaplin also unavailable as part of the terms of his Pompey loan.
Here’s how we think the Pompey boss will go, as he takes on the huge challenge of bouncing back from the New Year’s Day mauling at Bristol City.
5. CB Conor Shaughnessy
Looked uncomfortable on first start since August but will need to shake off that rust quickly against Ipswich's array of attacking firepower. | Graham Hunt/ProSportsImages
6. LB Zak Swanson
Was taken off just after the hour mark with the game up at Bristol City, a move made to save some freshness for Sunday. | Graham Hunt/ProSportsImages
7. CM Andre Dozzell
Amid all the issues and changes in midfield Dozzell remains a near constant presence. Performance levels have varied, but so important to Pompey at present. | Graham Hunt/ProSportsImages
8. CM John Swift
A hapless showing from Le Roux at Bristol City means he surely can't start on Sunday. So it's either shift the defence around and move Devlin to middle of the park, or go with Swift who needs a big game. | Graham Hunt/ProSportsImages