And the Blues do so with their squad defined for the months ahead at the close of the transfer window.
There are players coming back from injury and ineligibility against the Black Cats, before the pause for the international break.
Here’s how we think Pompey will line up at a sellout Fratton Park.
5. CB: Ryley Towler
Congrats whoever called Towler starting the first four league games - which surpasses his total for all of last season in League One! | National World
6. LB Connor Ogilvie
Competition will be stepped up after the international break with Jacob Farrell's return, but Mr Dependable remains first choice left-back. | National World
7. CM Marlon Pack
Neck issue didn't restrict Pompey's skipper at Boro - and will be needed to dictate again against the Black Cats. Photo: Jason Brown
8. CM: Andre Dozzell
More of the donkey work by Dozzell at Middlesbrough as he continues to put industrious shifts in since summer arrival. | National World