Sean Raggett headed Pompey into a 12th-minute lead before Paddy Lane struck twice in a routine away victory for the new League One leaders. Here are our player ratings from Sixfields...
5. Patrick Brough
Straight back in the side having missed out in midweek and largely held his ground against the tricky Kamara, even if there were some tough moments. His crossing was erratic on the few occasions he ventured forward... 6 Photo: Pete Norton
6. Jack Sowerby
Uncharacteristically loose and sloppy as Pompey bossed the midfield battle. His day was summed up by an ill-advised dummy which set Pompey away on the break for the killer third goal... 5 Photo: Pete Norton
7. Shaun McWilliams
Sporting a new look with his bleach blonde hair and he was as bright and as energetic as anyone in claret. Covered plenty of ground and even at 3-0 down he was charging about the pitch trying to get something going for his beaten side... 7 CHRON STAR MAN Photo: Pete Norton
8. Marc Leonard
Not at his usual high level and wasn't able to play with the class and quality we've become accustomed to as Pompey kept him quiet... 6 Photo: Pete Norton