The Rocks face Hastings for the prize of a trip to Brighton’s Amex Stadium for the Sussex Senior Cup final.
Tonight’s semi-final is at Lancing’s Culver Road ground and we’ll have all the action as it unfolds.
The tie has to be decided on the night so it will go to extra-time and penalties if necessary.
Click here to launch our live coverage, in which you can get involved with your comments and questions to sports editor Steve Bone.
We’ll have a match report on this website later tonight.
Get all the news from Nyewood Lane in the Observer - out on Thursday morning