Since the head coach’s arrival, the Blues have only lost once and are undefeated in their last three games on home soil.
Another impressive attendance was recorded on Saturday as 17,942 fans watched Mousinho’s side beat Forest Green 1-0, along with the club’s 125th-anniversary celebrations.
Indeed, Pompey have recorded an average home figure of 18,092 so far this term, with redevelopment work on the Milton End taking place.
But how packed has Fratton Park been this season?
Football Web Pages has provided data which shows the percentage each stadium has been filled this term.
Here’s where the Blues’ home compares.
13. Hillsborough - Sheffield Wednesday
Average attendance: 24,961; Capacity: 39,732; Percentage of stadium filled: 62.6 per cent. Photo: Jacques Feeney
14. St James Park - Exeter
Average attendance: 6,709; Capacity: 8,720; Percentage of stadium filled: 63.5 per cent. Photo: Pete Norton
15. Montgomery Waters Meadow - Shrewsbury
Average attendance: 6,318; Capacity: 9,875; Percentage of stadium filled: 64 per cent. Photo: Naomi Baker
16. University of Bolton Stadium - Bolton
Average attendance: 18,516; Capacity: 28,723; Percentage of stadium filled: 64.5 per cent. Photo: Lewis Storey