Pompey will help Charlton celebrate 25 years back at The Valley when the clubs clash on Saturday.
But the thousands of Blues fans making the trip to the capital will hope it is their side who have reason to party come 5pm.
Kenny Jackett’s men have already triumphed once there this season, although there were certainly not as many supporters there for last month’s contest.
Just 206 away followers were present to watch Curtis Main seal a Checkatrade Trophy group stage victory.
It is League One points up for grabs this weekend, however, and the sides are closely matched in the current standings.
Charlton are two places – and six points – higher in sixth spot, although they do also have a game in hand.
But Karl Robinson’s troops have collected just one win from their past four league outings to dent their automatic promotion hopes.
Pompey have not visited the Addicks for a league fixture since both sides were in the top-flight during the 2006/07 campaign.
Lomana LuaLua’s strike was enough to secure all three points for the Blues, although Charlton triumphed in the return fixture at Fratton Park.
TEAM NEWS
Brett Pitman is set to return to the Pompey side after returning to training following a hamstring injury.
But there are still doubts over the availability of Ben Close (thigh), Dion Donohue (back), Oliver Hawkins (hamstring) and Kal Naismith (knee).
Milan Lalkovic (Achilles), Damien McCrory (knee) and Jack Whatmough (knee) are all still sidelined for the Blues.
Former Pompey defender Jason Pearce could be fit for the hosts, but Patrick Bauer (foot) and Tariqe Fosu (hamstring) are both out.
VIEW FROM THE DRESSING ROOM
Read what Kenny Jackett and Jamal Lowe have to say about the game or register for a free iFollow account to watch the below videos.
HEAD TO HEAD
Overall
Pompey: 42 wins
Charlton: 33 wins
27 draws
At Charlton
Pompey: 16 wins
Charlton: 19 wins
16 draws
TICKETS
Pompey have sold their full allocation of tickets for Saturday’s match and no more will be made available. Please do not travel without a ticket.
MATCH COVERAGE
Domestic iFollow subscribers can listen to live commentary of Saturday’s game by signing into their account and visiting the match centre.
Overseas subscribers can watch the match live by following the same instructions.
Click here for more information about using iFollow on a matchday and click here for information on downloading the app, so you can access content on your mobile device.
We will also have updates on Twitter and via the match centre.
There will be post-match reaction on the website, iFollow and our official YouTube channel, with
highlights to follow on Sunday.
Local listeners can hear commentary on Express FM or BBC Radio Solent (not online), while The News will also have extensive coverage.
BETTING
Charlton are 7/5 favourites with Sky Bet to secure all three points, while Pompey can be backed at 2/1.
Click here to read our full betting guide and sign-up at www.skybet.com/pompey for great offers and promotions. Please gamble responsibly.
ALSO IN LEAGUE ONE
Blackpool v Rotherham
Bradford v Rochdale
Bristol Rovers v Southend
Bury v AFC Wimbledon
MK Dons v Shrewsbury
Oldham v Northampton
Oxford v Doncaster
Peterborough v Blackburn
Plymouth v Gillingham
Walsall v Scunthorpe
Wigan v Fleetwood
LAST MEETING