Crawley boss John Gregory felt his side were denied a clear penalty during the 1-1 draw at Swindon.
Gregory's side secured a point after Matt Tubbs bagged a late equaliser to cancel out Nathan Byrne's strike.
But they could have taken the lead in the first half when striker Jamie Proctor was hauled down.
Gregory said: "We've seen similar penalties on TV over the last weekend where the defender takes both his legs out and they certainly did that with Jamie.
"It's not given and there's nothing you can do about it, even when they're wrong they're right, so you just have to get on with it."
Crawley were playing just their fifth game of the year after a string of postponements but controlled the match from the start.
They fell behind in unfortunate fashion when Byrne diverted Jack Barthram's cross into his own net three minutes after half-time.
Tubbs levelled 10 minutes from time to extend Crawley's unbeaten run to five matches.
Gregory added: "I've just left the dressing room and 20-odd players are in there who are so disappointed we didn't win.
"Considering we came to a team with the second-best home record in the division, part of me is disappointed with some of the football we played.
"We looked totally relaxed and totally at home, and when I look back on it there will be a little nit-picking, but we didn't keep up our good passing and gave it away too much."