Match ends, Northampton Town 0, Cambridge United 1.
Harrison Dunk earned Cambridge a win at play-off-chasing Northampton.
Struggling Cambridge were quickest out of the blocks and took a first-minute lead when Dunk beat goalkeeper Matt Duke from the edge of the box.
James Gray headed over as Northampton tried to get back on level terms before Nathaniel Mendez-Laing almost doubled the home side's lead.
The Cobblers got close to an equaliser, but Ryan Cresswell headed wide and Brendan Moloney flashed a shot wide.
Northampton Town manager Chris Wilder told BBC Radio Northampton:
"It was a rubbish start. I stressed over the weekend we couldn't give Cambridge an opportunity to go ahead and that's what we have done. That gave them a massive boost and deflated us.
"There weren't any energy level problems. They were prepared to sit deep. We just couldn't pick the final pass.
"We really fancied this game and it's a big opportunity missed given the results elsewhere."
- 6CollinsSubstituted forDe Girolamoat 67'minutes
- 3HorwoodSubstituted forCarterat 86'minutes
- 11HackettSubstituted forToneyat 31'minutes
- 22De Girolamo
- 19BallBooked at 90mins
- 25Mendez-LaingSubstituted forKaikaiat 59'minutes
- 11DunkSubstituted forHuntat 86'minutes
- 32BirdSubstituted forSimpsonat 79'minutes
- Fred Graham
- Shots on Target
Second Half ends, Northampton Town 0, Cambridge United 1.
Dominic Ball (Cambridge United) is shown the yellow card.
Ivan Toney (Northampton Town) wins a free kick on the right wing.
Foul by Dominic Ball (Cambridge United).
Attempt missed. Brendon Moloney (Northampton Town) right footed shot from the right side of the box is close, but misses to the left.
Foul by Darren Carter (Northampton Town).
Ryan Donaldson (Cambridge United) wins a free kick in the attacking half.
Attempt missed. Michael Nelson (Cambridge United) header from the centre of the box is close, but misses to the left.
Corner, Cambridge United. Conceded by Ryan Cresswell.
Foul by Ryan Cresswell (Northampton Town).
Tom Elliott (Cambridge United) wins a free kick on the left wing.
Substitution, Northampton Town. Darren Carter replaces Evan Horwood.
Substitution, Cambridge United. Johnny Hunt replaces Harrison Dunk.
Attempt missed. Ricky Holmes (Northampton Town) header from the centre of the box is close, but misses to the left.
Corner, Northampton Town. Conceded by Greg Taylor.
Foul by Ricky Holmes (Northampton Town).
Dominic Ball (Cambridge United) wins a free kick in the attacking half.
Attempt missed. Sullay Kaikai (Cambridge United) right footed shot from very close range is close, but misses to the right.
Substitution, Cambridge United. Robbie Simpson replaces Ryan Bird.