John Sullivan has joined the Fratton faithful in the push to boost Pompey Academy facilities.
Almost 1,500 supporters have so far donated to the FanFunding scheme in its attempts to raise £250,000.
They have now been accompanied by the former Blues keeper, who has also contributed towards the drive to buy two new youth pitches.
Pompey have just passed £90,000, with 41 days remaining on the target set by organisers Tifosy.
Sullivan left the club this summer but had no qualms in aiding the Blues’ future.
And he has paid to own a virtual square metre of the Academy’s proposed training pitch.
‘I remember what it is like being a fan, being a Brighton supporter was tormenting,’ said Sullivan.
‘We didn’t have a stadium after we sold the Goldstone.
‘I used to go to Gillingham to watch them, which was a 200-mile round trip for home games.
‘We came back and got the Withdean Stadium, which wasn’t ideal. Then I ended up representing the club there.
‘Now they are at Falmer with a good stadium – but I know how important it is to have that in a community.
‘I feel donating to help Portsmouth’s youth facilities is the right thing to do.
‘Players have a responsibility and also this club needs to keep bringing youth through.
‘Adam Webster, Jed Wallace, Dan Butler and Jack Whatmough are great young players but you want more at this fantastic club.
‘My donation is just a thank you to everyone at the club for what they have done for me and I wish them all the best for the future.’
To donate visit tifosy.com/campaigns/pompey-academy