Charlie MacDonald scored on his debut as MK Dons beat Stevenage to maintain their spot at the top of League One.
The Dons dominated the first half but failed to find the target with Adam Smith and Shaun Williams firing over.
MacDonald, signed from Brentford on Friday, gave them the lead after half-time when he tapped in Luke Chadwick's square ball.
Jon Ashton came close to a late equaliser for the visitors but saw his header cleared off the line.
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MK Dons manager Karl Robinson told BBC Three Counties Radio:
"The first half you could almost apologise to the paying public.
"Their bus stopped me from coming in when I got to the stadium - they parked it in front of the goal as well in the first half.
"I am so happy that we stayed patient and then we stayed strong when they had at least eight six-foot one inch players on the pitch towards the end of the game. It was difficult to play against."
Stevenage manager Graham Westley told BBC Three Counties Radio:
"We showed them far too much respect over the 90 minutes. We tried to play a game that's not our game, we sat off in our defending and gave them far too much room.
"We know we have let ourselves down in terms of our performance level, we know there is room for improvement and believe me we will work at that improvement.
"When you come off of a promotion players forget some of the habits that got them where they are. I didn't see enough of the things I like on the field of play and that's why we lost the game."