they have only ever played once before at this level.
they were played in the 1979/80 season with wednesday winning 4-0 at hillsborough on boxing day 1979 in front of a record crowd for this division of 49,306.
the return match played at easter at bramall lane in front of 46,000+ with united holding out for a 1-1 draw.
i cannot see these attendance records ever being broken.