But Stags do remain in a good position to climb into the play-off places with three games in hand on sixth-placed Huddersfield and six points behind.
Stockport County picked up a battling point at leaders Cardiff City, while Luton Town slipped up following a 1-0 defeat at Plymouth.
Peterborough’s stunning climb up the table continued with victory at Wycombe. It leaves them four points off the play-offs and with a huge game at home to Huddersfield next weekend.
Bolton kept up the pressure on Lincoln with victory over Leyton Orient.
Here’s how those results have affected the latest promotion odds with league sponsors SkyBet.
1. Stevenage 1 Mansfield 1
Lucas Akins puts Mansfield ahead at Stevenage before the home side levelled in stoppage-time. Photo: Chris & Jeanette Holloway