Pompey are on the road on Thursday, when they take on Cheltenham in the second round of the FA Youth Cup (7pm kick-off).
Due to work at the Robins' ground, the tie will be held at Evesham United's Spiers & Hartwell Stadium (WR11 2LZ).
Tickets can be bought at the ground and are priced £5 for adults and £2 for concessions.
Professional development phase coach Liam Daish said: "We're looking forward to the game and will hopefully have a full squad to select from.
"It's going to be tough and we'll certainly need to be at our best, but we have a decent opportunity to make it through to the third round.
"We're in a good place at the moment and all the boys are working hard for each other.
"Some of them have been involved with the first team lately and they can take that experience into this tie."