Liam Vincent went closest to breaking the deadlock with a shot which struck the inside of the far post, while Anthony Scully had a goal ruled out for offside.
Yet the opening 45 minutes finished goalless ahead of a scheduled 11 changes at half-time as Mousinho utilised 22 members of his playing squad.
There were some encouraging displays and here are our player ratings for the first half...
1. Will Norris - 7
Came out of the box well to take possession of the ball on one occasion and there was one lovely left-footed pass to the left which just eluded Ogilvie. Yet not called upon to save anything. Photo: Portsmouth FC
2. Josh Dockerill - 7
A solid showing at right-back. Did little wrong and used the ball effectively when called upon. Clearly enjoying stepping up to the first-team environment this pre-season. Photo: Jason Brown
3. Sean Raggett - 7
Rarely troubled and fully in control, as you’d expect. Kept things simple and a solid display all-round. Photo: Jason Brown
4. Ryley Towler - 7
Produced a left-footed shot from 30 yards in the 13th minute which the keeper couldn’t hold, while was lucky to escape receiving a booking after a foul on Pattenden. Another good game, though. Photo: Sarah Standing