Sedgefield led from the start - 5-2 in the second quarter, 8-5 in the third. The advantage went to 11-8 when Ryan Griffiths scored for Sedgefield midway through the final period.
Worthing's young team refused to give way. Goals by Joao Martins and Henry Broadhurst cut the Sedgefield lead to 11-10 with just over a minute remaining. The equaliser - the first time Worthing had been level since the start of the match - came just 29 seconds from the end when Martins converted a penalty.
Croydon defeated Castleford 11-8, breaking clear in the final quarter with goals by Steve Leathwood, Bren Heath and Kevin Steele.
A day of close finishes ended with Rotherham Metro's Ben Greenhill and Henry Jackson both scoring twice in the last period to clinch a 12-9 success against Chheltenham Spartans. Otter and Manchester Hawks drew 10-10 - Orion Ganase's man-up score near the end salvaged a point for the London team.