Selsey claimed a place in the final of the Sussex RUR Cup after a 2-0 win over Rye United at Shoreham.
Mark Lee put them ahead with a close-range finish before Tom Ridley scored his 19th goal of the season to make it safe when he cut in from the left to fire home.
Boss Danny Hinshelwood said: "I thought we were deserved winners.
"Our goalkeeper only had one save to make and we scored two good goals.
"The final gives us something to look forward to and will give us confidence to climb up the league table as well."
County League division two: Lancing 3 (Griffin 4, Burton 15, own goal 35) Southwick 3 (Molyneaux 17,23, Venton 90), Peacehaven v Wealden.
Division three: Bexhill United 1 (Funnell 35) Haywards Heath 0.
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