View the photos from the Blues' convincing win at Fratton Park
Pompey got their Checkatrade Trophy group stage campaign off to the perfect start with a 4-0 victory over Gillingham.
Brett Pitman hit the bar early on, before Matt Clarke and Ben Close both struck just before the break to give the hosts a commanding lead.
Pitman added a third from the penalty spot following a foul on debutant Andre Green by Aaron Simpson.
And David Wheeler then rounded things off with a goal late on to open his account for the Blues.