The Reds were a goal behind at the break after a poor first-half, which saw very few goalscoring opportunities in a bitterly cold afternoon.
John Yems reacted by bringing on an extra forward in Tom Nichols, who replaced the quiet Tyler Frost.
The hosts immediately improved and found a leveller just minutes after the restart. James Tilley followed up his goal at Barrow last week, with a stunning strike from outside the box.
Crawley’s tails were up and it looked like they then might find a winner but it was Mansfield who broke clear and sealed the three points.
Here’s how we rated the players.
The hosts immediately improved and found a leveller just minutes after the restart. James Tilley followed up his goal at Barrow last week, with a stunning strike from outside the box.