The outcome has been successive defeats, leaving Paul Cook’s side nursing their lowest League Two position since August.
Regardless, the Blues possess the mantle of the joint-best defensive record in their league.
What’s more, nobody has this season claimed more League Two clean sheets than goalkeeper David Forde.
And from that solid foundation the Blues are seeking to force a way into the automatic promotion spots.
Certainly the defence has come under scrutiny from supporters on occasions, likewise the selection of Millwall loanee and ever-present Forde.
Yet even runaway leaders Doncaster Rovers cannot come anywhere near to matching Pompey’s against column so far.
Admittedly, Darren Ferguson’s side have scored 19 times more than the Blues, having played one game more.