AFC Wimbledon slumped to their first defeat in four games as they went down to League Two leaders Chesterfield.
Goals from Gary Roberts and Sam Hird did the damage as the Dons slipped to only their second loss of the campaign.
Neal Ardley kept faith with the side that beat York last weekend, with Rhys Weston back on the bench following a hamstring injury.
Dons had the best chance just before the half-hour mark when in-form Michael Smith, who smashed four goals in his prevous four games, was denied by Spirites keeper Tommy Lee.
And the visitors were made to pay for that miss shortly after when James O'Shea crossed from the left for Roberts to convert from close range to hand Chestefield the edge at the break.
Roberts turned provider at the beginning of the second half as the hosts doubled their lead, with Hird making it 2-0 to leave the Dons with a lot of work to do.
Ardley introduced Jack Midson, Chris Arthur and Charlie Strutton as the visitors desperately tried to find a way back into the game.
However, they couldn't find it as they returned back down south empty handed.
DONS: Worner, Fuller, Bennett, Frampton (Strutton 79), Fenlon, Frampton, S Moore, Pell, Porter (Midson63), L Moore (Arthur 63), Smith.
Subs (not used): Brown, Weston, Kennedy, Sweeney.
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