Lewes's delight at clinching an FA Cup fourth qualifying round replay was marred by a row over referee Russell Green.
Boss Jimmy Quinn was furious with Green for booking four of his players and only carding one of the home team's in reply.
The visitors' Paul Stokes, Mark McCallum, Justin Harris and Andy Johnson were all shown the yellow card, the latter two inside the opening ten minutes.
Quinn raged: " I don't think he was a good referee. He booked four of our players for nothing. It was embarrassing, it wasn't a dirty game, there were no dirty tackles. It was a competitive game and I don't think he handled it very well.
"I don't want to rant at referees but he gave a free kick on the edge of our box after we cleared the ball.
"If that goes in, we are out of the cup and it denies the players a fair crack at getting to the first round and the club a lot of money.
"I've no confidence in the guy. You really want somebody to let the game flow and give decisions as they happen."
There were suggestions Lewes would try to change him for tomorrow's replay. However following post-match discussions between directors and the official, Green will be back in the middle for the replay.
Lewes more than matched their more illustrious Dr Martens League western division opposition, but with both sides displaying nerves there was little goalmouth action.
Mangotsfield wasted a chance to take the lead when Lee Barlass failed to connect with Stephen Campbell's inswinging cross in the fifth minute.
Ross Venables had a shot charged down for Lewes and Dominic Shepherd, who has scored in every round of the competition thus far, could not get his head to Sam Francis's right wing cross.
The visitors relied on the pace of Francis and Shepherd to trouble to home defence and Quinn's side played a succession of hopeful balls over the top for the pair to chase.
The Mangos' Mark Summers headed over Campbell's corner when unmarked in the 19th minutes and Lewes captain Marc Cable made a vital last-ditch tackle on the lively Campbell as he lined-up a shot close in.
Francis had probably the Sussex side's best chance when his firm header from Harris's free kick produced a good save from Dave Dyson, diving to his left.
In the second half Lewes conceded more possession to Mangotsfield but the home side never really tested Ross Standen.
In particular, Australian David Seal, who has 11 goals in the competition thus far, was subdued, most likely because of a bout of chicken pox he caught off his four-year-old daughter.
Quinn added: "I was not satisfied with our performance but I am happy we have another chance to progress."
And Quinn suggested he could make alterations for the replay. He added: "One thing I will be looking to change is the attitude of some of the players. They were scared, in the second half they sat back waiting to get beat.
"The midfield didn't want the ball and they ended up having to resort to the long ball and we aren't a good side when we play like that.
"We are better when we go at teams and move the opposition about with short passes behind defences."
Skipper Cable said he was relieved with a draw after such a tense occasion.
He said: "It was a massive game that was always on a knife-edge.
"We are evenly matched and I am more than happy to take them back to our place."
Final score: Mangotsfield 0, Lewes 0
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