Second-half goals from Tom Craddock and Deane Smalley saw Oxford United beat Northampton Town to secure their first win in seven matches.
Craddock gave the U's the lead with a fierce angled shot, after being picked out by Alfie Potter.
Craddock then missed a penalty after being brought down by John Johnson.
Smalley doubled the lead late on by turning in James Constable's cross but Adebayo Akinfenwa saw a late penalty saved by U's keeper Ryan Clarke.
Cobblers manager Aidy Boothroyd is still looking for his first win.
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Oxford United boss Chris Wilder told BBC Radio Oxford:
"It was an unspectacular performance but a win that we worked hard for.
"They were very disciplined and we knew they would be. The new manager coming in there has given them a lift.
"A 2-0 home win and a clean sheet is good to have just before Christmas."
Northampton manager Aidy Boothroyd told BBC Radio Northampton:
"We kept going to the end and people were still working. We're the ones making mistakes, but the work ethic is there and the attitude is there.
"It's little things like getting clearances right and making sure that you make goalkeepers make saves. Physically and mentally, at times, we switched off.
"If I was saying we needed 15 new players, there would be panic stations, but that isn't the case."