Pompey have added a trip to Leyton Orient to their pre-season schedule.
Danny Cowley will take his side to Brisbane Road to face League Two opposition on Tuesday, July 19 (7pm kick-off).
A match at Gillingham has already been announced, as have contests with local non-league outfits Havant & Waterlooville, Gosport and Bognor.
Pompey will also confirm a Fratton Park fixture in due course and are looking to plan a game during their Spanish training camp.
Orient finished 13th in the fourth tier last term, with former Blues boss Kenny Jackett in charge for much of the campaign before being replaced by Richie Wellens.
It will be the first time the sides have met since the triumphant 2016/17 season, with Christian Burgess netting the only goal in east London.
| Date | Opponents | Kick-Off |
| Sat, July 2 | Hawks (A) | 3pm |
| Sun, July 3 | Gosport (A) | 3pm |
| Sat, July 16 | Gillingham (A) | 3pm |
| Tue, July 19 | Leyton Orient (A) | 7pm |
| Wed, July 20 | Bognor (A)* | 7.45pm |
| Sat, July 23 | TBC (H) | TBC |
*Pompey XI fixture