Phil Johnson scored twice as Hassocks shocked Premier Division title-chasers Horsham YMCA at the Beacon.
James Littlejohn, Liam Benson and Will Broomfield scored the other three goals on a brilliant afternoon at the Beacon which saw Hassocks win 5-3.
Mark Dalgleish's side were 5-0 up before Guy Harding (2) and Jack Hartley reduced the deficit at the end.
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Burgess Hill Town lost 2-0 to Bognor Regis Town at the Green Elephants Stadium while Haywards Heath Town drew 0-0 away at Hythe Town.
Full reports to follow..