Liam Robinson was also on target in a 3-1 victory at Pagham - the Royals’ 14th Premier Division win in 15 games this season.
Pagham, who have now lost nine league matches in a row, had levelled in the first half through ex-Horndean and Moneyfields striker Evan Harris.
1. Harrison Brook shoots
Harrison Brook shoots. Picture by Nathan Lipsham Photo: -
2. Harrison Brook , left. Picture by Nathan Lipsham
Harrison Brook , left. Picture by Nathan Lipsham Photo: -
3. Brett Pitman on the ball for Portchester
Brett Pitman on the ball for Portchester. Picture by Nathan Lipsham Photo: -
4. AFC Portchester celebrate a goal at Pagham
AFC Portchester celebrate a goal at Pagham. Picture by Nathan Lipsham Photo: -