The south-coast side have sold 4000 tickets for the clash with the Royals, ensuring the South Stand will be jam packed with away fans.
All previous 'sell out' matches at the Madejski have seen scores of seats left empty for segregation reasons. With new fences in place the empty seats are now confined to the histroy books.
Royals fans who wish to attend the game are advised to get hold of tickets soon as the match is likely to sell out.
In the unlikely event that all tickets aren't sold none will be available on the day for the strictly all ticket encounter.
The titanic pre-Christmas clash is sure to be a classic encounter. The Royals are currently placed thirteen points behind Pompey, although they have a game in hand.
Alan Pardew's side and the supporters will be well up for the game, three points would boost optimisum that we can land in the play-offs this first season in Division One.