Boss John Mousinho has some big decisions to make both over formation, after playing a back three at Fleetwood, and whether to start the likes of new boy Myles Peart-Harris after his arrival from Brentford.
Here’s how we think the Blues will go at Vale Park.
17. Sub 6: Myles Peart-Harris
Does he start or is it a place on the bench? Big call and maybe formation is a factor here - but expect new boy to play some role at Vale Park. Photo: Portsmouth FC
18. Sub 7: Christian Saydee
Anticipating an impact off the bench from the striker - as he invariably produces. Photo: Jason Brown