The Blues were 3-0 up after 26 minutes through goals from Ryan Tunnicliffe, Michael Jacobs and Ronan Curtis, with substitute Louis Thompson wrapping it up in stoppage time.
And excellent display, particularly in the second half, with so many superb displays – and here are our on-the-whistle player ratings...
9. Joe Morrell - 8
Another high octane and high calibre performance from the man of the moment, who snapped and snarled in the midfield areas throughout, never letting the Robins settle. Photo: National World
10. Ronan Curtis - 7
(Replaced by Dane Scarlett on 68 minutes) Capped a lovely move to earn Pompey’s third goal and always in the thick of the action. Yet wasted several great openings in the second-half to increase their lead, usually with a poor pass. Photo: National World
11. Owen Dale - 7
(Replaced by Denver Hume in 85th minute) Everyone is urging him to grab the goal or assist that his work-rate deserves, yet continues to elude. One special first-half moment saw him rattle the crossbar following a fantastic run. Photo: National World
12. Michael Jacobs - 9 - MOM
(Replaced by Paddy Lane on 76 minutes) Handed the number 10 role and the freedom saw him back with his brilliant best. Scored the second goal and one wonderful second-half pass to Bishop should have ended in another. Also struck bar in second half. Photo: National World