It looked as though a shock could be on the cards when Danny Andrew's header gave the U's a 38th-minute lead.
However, Pompey got back on terms just before the break. Kusini Yengi was fouled in the box on 44 minutes and then stuck away the resulting penalty.
Brentford loanee Myles Peart-Harris produced a low finish to give Portsmouth the lead just before the hour mark and the points were in the bag when Abu Kamara curled home a superb angled effort on 71 minutes.
Mousinho said: "I'm really pleased to get all three points - and I think the overall performance meant we deserved them.
Denne historien er fra February 18, 2024-utgaven av The Football League Paper.
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Denne historien er fra February 18, 2024-utgaven av The Football League Paper.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
Allerede abonnent? Logg på
CLASSY CURTIS GETS HIS REWARD
DERBY County have tied influential centre-back Curtis Nelson down to a new contract that will keep him at Pride Park until 2026.
STATS ALL RIGHT FOR STUDIOUS MK BOSS SCOTT
MK Dons boss Scott Lindsey has highlighted the importance of statistics following his side's recent good form.
SMITH'S FRATTON STUNNER IS TOPS!
MICHAEL Smith's stunning strike for Sheffield Wednesday against Portsmouth has won him the Sky Bet Championship Goal of the Month award for October - but he admitted it could have gone 'over the stand'!
RED DRAGONS SUFER TRIPLE INJURY SETBACK
WREXHAM'S pursuit of a historic promotion from League One has been hit by a triple injury blow.
SMART GUY LAUNCHES AI PLAN TO AID CLUBS
FORMER Rotherham, Hull and Sheffield Wednesday defender Guy Branston has launched a new AI venture that he says will revolutionise the way clubs engage with their fans.
STRIKER BISHOP JUST SO GLAD TO BE BACK
COLBY Bishop has expressed his delight at making an emotional goalscoring return for Portsmouth following open heart surgery this summer.
HUNGRY JAMIE'S IN GOAL GROOVE
Prize winner is followed by Cup heroics
TASTY TERRIERS TAKE A BITE OUT OF UNITED'S YOUNG GUNS
HUDDERSFIELD Town booked their place in the last 32 of the Bristol Street Motors Trophy in style with a thumping 4-1 home win against Manchester United U21s.
KENNY RECEIVES PRAISE OF BOSS BONNER
GILLINGHAM manager Mark Bonner says he will miss leaning on the experience of \"brilliant\" mentor Kenny Jackett.
WEAVER HAPPY TO GIVE ACE ENO HIS SHOT
HARROGATE Town boss Simon Weaver is hoping new striker Eno Nto can solve the Sulphurites' woes in front of goal.
