Scott Parker made nine changes to the side that produced that brilliant comeback away at Crystal Palace in the Premier League in midweek and the weakened Clarets team ultimately came back to bite them.
Jacob Bruun Larsen, Ashley Barnes and Loum Tchaouna all missed gilt-edged chances to put the game beyond Mansfield on the day but their lack of game-time showed with rustiness in front of goal.
Parker's side finished with an expected goals tally of 3.82, their highest of the 2025-26 campaign by some distance - yet they were only able to find the net once.