A Pompey XI held on to secure victory in a pre-season contest at Nyewood Lane.
Eoin Teggart raced onto Brett Pitman's flick to open the scoring on a fine evening in Bognor.
Pompey's skipper then doubled the advantage with a goal of his own, while the Blues also struck the crossbar three times.
Dan Smith reduced the Rocks' deficit after the break, but a youthful visiting side managed to secure a 2-1 win.