Lloyd Kerry struck inside a minute to hand Tamworth a scrappy victory over Lincoln City in the Blue Square Bet Premier.
In the opening seconds Kerry latched on to Shaun Jeffers' pass to poke home from close range.
Both sides were reduced to 10 men before the half-hour mark when Richard Tait and Gary Mills received straight red cards for violent conduct.
And there was nothing to show for a low-quality second half of action.
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Lincoln City manager David Holdsworth told BBC Lincolnshire:
"For me the official got it completely wrong. Prior to the goal we were expecting it to be our ball (from a throw) and they've broken and scored, but I thought the refereeing was somewhat strange.
"We responded very well, we had seven chances but we didn't hit the target. End product is what you're after and I think for the majority of the game we were the better side.
"The sendings off were needless. Both of them should look at themselves and I'll deal with Gary but it's something he didn't need to be involved in and he probably regrets it now.
"At half-time a readjustment was made and I felt in the second half we dominated possession in and around the box but the end product was amiss. A little more imagination and creativity in certain areas and we may have secured the goal but it didn't come. We kept chasing the game and had a go but it wasn't good enough."