Pagham take on Brighton’s under-23s for a place in the Sussex Senior Cup final next week.
And chairman Tony Shea says they believe in their ability to pull off a shock and reach the Amex showpiece.
The Lions will start as underdogs against the Seagulls’ youngsters but Shea says confidence is high at Nyetimber Lane ahead of Tuesday’s semi-final at Sussex FA HQ at Lancing.
Crawley Town await the winners after beating Saltdean 6-0 in the first semi.
Shea said: “It’s a massive game – it’s a long time since we were in a senior cup semi.
“It’ll be really tough against good young players from a professional club but we have a good side who score goals and don’t let too many in.
“If we can start well and keep it solid, who knows?
“Brighton only beat East Preston 3-2 and Haywards Heath 2-1 in earlier rounds.”
Pagham have had an excellent season, sitting sixth in the Southern Combination premier with hopes of a top-two finish and promotion, and are in the RUR Cup final.
Pagham will be without prolific scorer Dan Simmonds against Brighton. He is starting a three-game ban.
The Lions head to Lancing first - for a league game on Saturday.