James Armson scored twice as Nuneaton beat play-off chasing Cambridge in the Blue Square Bet Premier.
The visitors took an early lead when Armson diverted Neil Cartwright's cross past keeper Craig Ross.
Armson extended the advantage after the break with a header from 12 yards, before Andy Brown's smart finish from inside the area put the game beyond doubt four minutes later.
Michael Gash nodded in a late consolation for Cambridge.
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