Crawley extended their unbeaten run to 15 matches with a draw at 10-man Crewe.
Visiting goalkeeper Scott Shearer had already denied Byron Moore and Shaun Miller before Wes Fletcher put Crewe in front, heading in Byron Moore's cross.
The hosts were reduced to 10 men when striker Miller was shown a straight red card by referee Stuart Attwell for a dangerous tackle on Sergio Torres.
And the League Two leaders soon equalised when Andy Drury's cross was converted by Matt Tubbs.
Attwell, who was recently involved in controversy when he sent off Bolton defender Gary Cahill in their defeat at Tottenham, was rarely out of the limelight, turning down three Crewe penalty claims.
Crawley, who have not lost since 13 September, are now four points clear of Southend and Cheltenham at the top of League Two.
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Crewe manager Steve Davis told BBC Radio Stoke:
"I'm very proud of the players today. I thought they were exceptional for the 75 minutes that we had to defend.
"When we had 11 men, I fancied us to go two or three goals up because we had two or three great chances early in the game.
"I haven't seen the tackle again. I'll have a look at it but I'm not going to comment on that or the sending off. If it's a bad one, then he deserved it."
Crawley manager Steve Evans told BBC Sussex:
"Fair play to Crewe. They've probably never worked as hard in a game before.
"I'm disappointed with the first 15 minutes. We didn't start like the Crawley Town we know. From there on in, it was waves of attack.
"I can't say to my players 'work harder' but I can say 'work smarter'. We didn't take the chances that came our way, but we go into Christmas Day top of the league, and we'd have taken that in the summer."