Pompey will look to beat a record that has stood for 34 years when they visit Coventry this evening.
The 1984/85 campaign was the last time that the Blues began a season with 10 unbeaten league games.
They fell at the next hurdle to Wimbledon on that occasion, but the current crop will try to make it 11 on the bounce at the Ricoh Arena.
Coventry are sitting 14th in the League One standings following Saturday’s 1-1 home draw with Sunderland.
The four other fixtures on their own patch have resulted in victories over Plymouth and Barnsley, and defeats to Scunthorpe and Rochdale.
It has been a solid start for Mark Robins’ men, who beat Exeter at Wembley to secure promotion via the play-offs last term.
This is the first time the sides have met in league competition since both were in the third tier during the 2012/13 campaign.
Pompey collected four points from the Sky Blues during that ill-fated season, although Coventry were 3-2 victors in a Carabao Cup clash a couple of years ago.
Andre Green (knee) is still injured, while Dion Donohue is not ready for action after returning to training following a hamstring problem.
Coventry goalkeeper Lee Burge is a doubt after being hit in the head by an ice hockey puck while watching a match on Sunday.
If he is unable to feature, then former Pompey stopper Liam O’Brien will replace him between the sticks.
Fellow ex-Blues players Michael Doyle, Tom Davies and Dominic Hyam could also play a part, but Conor Chaplin cannot appear against his parent club.
HEAD TO HEAD
Pompey: 11 wins
Coventry: 15 wins
Pompey: 3 wins
Coventry: 10 wins
Pompey fans can buy tickets from away turnstile five (cash only) at the Ricoh Arena this evening, although prices do increase by £3.
Supporters collecting tickets can pick them up from the ticket office located opposite the casino.
Please note that there is a residents’ permit zone in place around the ground and fans are advised to pre-book official parking.
Please note that subscribers will still need to purchase a match pass in order to watch the game live.
Overseas subscribers and match pass holders can watch the action, with commentary starting from around 10 minutes before kick-off.
ALSO IN LEAGUE ONE
Accrington v Doncaster
AFC Wimbledon v Bradford
Barnsley v Plymouth
Burton v Southend
Fleetwood v Wycombe
Oxford v Luton
Rochdale v Bristol Rovers
Scunthorpe v Charlton
Sunderland v Peterborough
Walsall v Shrewsbury