David McNabb's side will face Hornchurch in the Pitching In Super Cup, a new concept that brings together last season's FA Trophy and Vase winners ahead of the 2021/22 season.
Rylands lifted the FA Vase in May for the first time in their 115-year history, defeating Binfield 3-2 thanks to a hat-trick from Tranmere Rovers bound Elliot Nevitt.
The Urchins stunned Hereford in the FA Trophy final with a 3-1 victory, landing manager Mark Stimson his fifth FA Trophy, following a fairy-tale run which saw them claim six other higher-division scalps.
Super Cup tickets
The clash will take place at Hornchurch Stadium, Upminster, Hornchurch FC on Saturday, August 7, with a 12:45pm kick-off. If the scores are level at full-time, the title will be decided by penalties. Tickets are just £10.00 for adults and £5.00 for concessions, while the match will also be streamed for just £5.
Super Cup stream
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