Cheltenham overcame the 18th-minute dismissal of midfielder Kyle Storer to hold in-form Mansfield to a 0-0 draw at Whaddon Road.
The flashpoint arrived when Storer launched into Jamie McGuire with a full-blooded challenge on the halfway line in front of the visiting bench.
Referee Charles Breakspear wasted little time in brandishing a straight red card, with Robins manager Gary Johnson sent from the dugout in the aftermath.
Cheltenham were rocked for a spell but the Stags, beaten once in their previous 12 Sky Bet League Two outings, could not find a way through as Ben Whiteman scuffed horribly off target from two presentable openings.
The hosts began the second half on the front foot with Mansfield skipper Lee Collins getting a vital touch on Will Boyle's on-target header shortly before Liam Davis hit the crossbar straight from a corner on 51 minutes.
Trending
- Euro Super League announcement due | Liverpool, Man Utd in plans
- Russell slams 'dangerous' Bottas after huge Imola crash
- Verstappen wins, Hamilton second after error in chaotic race
- The Inter Miami story: Beckham, Neville, and MLS 2021 on Sky
- Man Utd, Arsenal fans slam Champions League reforms
- Weigh-in push leads to cancellation of UFC fight
- Bayern 'disapprove' as Flick asks to leave
- Mourinho on Pogba criticism: I couldn't care less
- Jake Paul KOs Ben Askren in one round
- Sheff Utd down - and now in need of direction
Whiteman miscued again from 18 yards just before the hour and Mansfield substitute Shaquile Coulthirst lifted over from inside the box late on as Cheltenham secured a fourth successive clean sheet.
