...but they're on sale on the day.
Joe Dunne and his side will go to Fratton Park looking to build on their weekend win over Walsall and move further clear of the bottom four places in the League One table.
Tickets will be on sale until 2pm at Colchester United, but they will also be available to buy on the day.
U's fans purchasing their tickets on the day in Portsmouth should go to the Frogmore Road ticket office.
Ticket prices for the game can be found HERE.