Guernsey FC will have to wait to see if they can play a first-ever FA Cup tie in the Channel Islands after drawing 2-2 at Phoenix Sports.
Russell Bedford headed the home side into a 43rd minute lead, but Ross Allen equalised from a 64th minute penalty.
Allen thought he had won it for the Green Lions with his 83rd-minute strike, but the home side equalised in stoppage time to secure a replay.
The game will be held at Lewes on Wednesday 2 September.
Under FA rules, any replay Guernsey face must be played away from home due to the cost of sides travelling to the island for a mid-week match.
The winners will host Lewes in the first qualifying round on Saturday 12 September.
The result also means Guernsey match with South Park on Monday has been postponed and will be re-arranged for a later date.