The Blues were reduced to 10 men on 21 minutes after Marcus Harness’ tackle from behind on Ross Sykes.
However, the incident didn’t appear to impact the Blues, who extended their unbeaten run to six games.
Indeed, they added three more goals to George Hirst’s 16th-minute opener, with Sean Raggett (28), Hirst again (56) and Ryan Tunnicliffe (69) all getting in on the act on a profitable day in front of goal for Danny Cowley’s side.
9. Marcus Harness - 4
(Sent off after 21 minutes): Can have no complaints over his dismissal. Awful loss of control. Photo: The News
10. Aiden O'Brien - 8
(Replaced by Jay Mingi on 78 minutes): Fans sung ‘Sign him up’ in recognition of another excellent showing, particularly his involvement for fourth goal. Photo: JPIMedia
11. George Hirst - 9
(Replaced by Tyler Walker on 73 minutes): Another towering performance as his Pompey reputation continues to soar. Photo: The News
12. Joe Morrell - 6
(Replaced Louis Thompson on 71 minutes): Dogged in midfield upon his introduction. Photo: JPIMedia