Pompey have added AFC Wimbledon to their list of pre-season fixtures.
The Blues will take on the League Two club on Wednesday, August 8 at Cherry Red Records Stadium - also home to Kingstonian (7.45pm).
It will be the first time Pompey have faced the Dons, who were formed in 2002 following the decision to relocate Wimbledon to Milton Keynes.
As well as the friendly with Terry Brown’s side, the Blues have already lined up a summer match with the Hawks on Saturday, July 14 at Westleigh Park.
They will then fly out to Spain for a pre-season tour on July 16, before moving on to face the Gibraltar national side on Friday, July 20 (8pm kick-off).