Substitute Ashley Nadesan saw red early on in a feisty second-half but ten-men Crawley stood firm for a valuable point.
The forward had replaced defender and goalscorer Joel Lynch, who was forced off with an injury at half-time.
Right-back George Francomb also came off injured in a dramatic first-half, which saw the Reds come from a goal down to lead at half-time.
Following the two injuries, and red card, a number of players played in makeshift positions and put in extra defensive work to grind out a draw.
Here’s how we rated John Yems’ men.
Right-back George Francomb also came off injured in a dramatic first-half, which saw the Reds come from a goal down to lead at half-time.