A thrilling first-half began with Ryan McAidoo scoring from the second phase of a set piece, after a deflection guided the ball to him, before Marcel Tola responded for Derby after City failed to clear from a corner.
Reigan Heskey fired City back into the lead, but Jerome Richards brought Derby level once more from a quick break.
The first-half concluded with goals from Dan Batty and Israel Green as the second the third placed couldn’t be separated and both played their part in an enthralling contest.
Heskey tapped in his brace and Kian Noble headed in from a corner to secure all three points for Reiss’s young team in the second-half.
City extend our winning run in the league to seven matches to build a three-point gap on the hosts.
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