MK Dons Under-18s missed out on the chance to extend their lead at the top of the Youth Alliance FL Cup table, after they were beaten 2-0 by Northampton Town on Saturday.
A goal inside a minute and a another early on in the second half condemned the Dons to their first defeat in the Football League Cup this season.
Mike Dove made two changes to the side that beat Stevenage last weekend, with Kyran Whiltshere and Ben Tilney replacing Mo Ahmed and Jake Lloyd.
The Dons, full of confidence after their recent run of form, started slowly and were punished straight from kick-off by an organised Cobblers side.
A Northampton winger drove down the left flank before firing in a powerful cross which was headed down perfectly for ex-Don David Moyo to finish past Charlie Burns and give the hosts an early lead.
This provided a wake-up call for the visitors who almost equalised through Dele Alli but his ambitious chip, after latching onto a through ball, just bounced wide.
Alli’s chance was the start of a sustained period of pressure for the travelling Dons who had several corners in quick succession after Kelvin Osei-Addo’s cut-back was just turned behind by the Town ‘keeper.
Captain Mason Spence also had an opportunity to level things up moments before the break but his shot sailed way over the bar.
The Under-18s started the second half the livelier with Alli once again the catalyst behind another exciting Dons move which was just cleared by Northampton.
However, despite the pressure, it was the home team who found grabbed the next goal, doubling their lead five minutes into the second period.
After breaking quickly down the left, forcing the Dons defenders to be pulled out of position, a strong cross was well controlled by Moyo who cooly slotted home to double his tally against his former Club.
It could have been three moments later but Burns did well to prevent from falling further behind and keep them in the game with half an hour left.
Dove changed things around mid-way through the half, bringing on Gedeon Okito in place of Kelvin Osei-Addo forcing a re-shuffle in the Dons attack.
The switch seemed to help, with the boys from MK1 starting to control the tempo and dictate play but still they couldn’t find a way past the stubborn Cobblers defence.
Brendan Galloway forced a good save late on after latching onto a terrific through ball from Alli before Spence saw his tight-angled cross trickle across the goal-line before being cleared.
The defeat keeps the Dons on six points with only one game left to play, against Luton Town on Saturday 3rd November.
MK Dons (4-2-3-1): Burns; Spence (c), Hickford, Galloway, Osae; Alli, Whiltshere; Rasulo; Summerfield, Osei-Addo (Okito 60), Tilney.
Subs not used: King (GK), Walsh, Tshimanga, Taylor.