Northampton earned their first win in nine games as they beat AFC Wimbledon.
Centre-back Lee Collins opened the scoring when he poked in from Darren Carter's lofted free-kick.
The visitors doubled their lead as debutant Stuart Dallas calmly slotted past Ross Worner inside the near post.
Wimbledon's best chances fell to Michael Smith, who saw his curled effort blocked, and Harry Pell who was denied an injury-time goal through a diving save by keeper Matt Duke.
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Wimbledon boss Neil Ardley tells BBC London 94.9:
"I'm frustrated and disappointed by the players, I challenged them before the game and said it was one I expected them to win.
"I challenged them prior to the game, and said it's a game we should win and it would tell us a bit about what we have to do and what aspirations we should have this season.
"We knew what they would do and my staff and I prepped them on everything and I can't defend my players. It was unacceptable."
Northampton boss Aidy Boothroyd tells BBC Radio Northamptonshire:
"We set up not to be beaten today but we knew we had enough players in the team to come here and get something.
"There's nothing in the league, we know that we've had a bad start but the last two games I've been really pleased with. We stuck at it and were really solid.
"My own disappointment is we could have had scored more goals for the opportunities we had, we could have made it more comprehensive."
AFC Wimbledon 01 Worner 02 Fuller 05 Frampton (Fenlon - 45' ) 06 Bennett 03 Kennedy (Midson - 60' ) 11 Moore 08 Moore Booked 12 Pell 07 Francomb (Arthur - 48' ) 21 Porter Booked 09 Smith Substitutes 10 Midson 30 Beere 15 Fenlon 04 Sweeney 22 Brown 24 Weston 19 Arthur Northampton Town 01 Duke 02 Amankwaah Booked 27 Kouo-Doumbe 03 Widdowson 06 Collins Booked 18 Reid Booked 04 Carter 08 Morris 11 Hackett Booked (Dallas - 57' ) 17 Deegan 10 O'Donovan Booked (Toney - 82' ) Substitutes 19 Emerton 26 Harriott 29 Dallas 12 Tozer 21 McNamara 24 Toney 07 Demontagnac
Ref: Andy D'Urso