Pompey have sold their full allocation of tickets for Saturday's visit to Wycombe.
It means that Kenny Jackett's side will be backed by around 1,800 fans for the League One contest at Adams Park.
Meanwhile, there are only a limited number of spaces remaining for the Good Friday visit to Burton, which kicks-off at 3pm and is being televised live on Sky Sports.
Click here for a list of tickets prices for the Brewers match and more information about how to purchase away tickets.
Supporters buying concession tickets are advised to bring proof of age identification with them to the game.
Official coach travel can be booked online here or by calling Lucketts Travel on 01329 237000.