MK Dons manager Karl Robinson admitted the decision that lead to the late penalty against Sheffield United was "baffling".
Shaun Williams coolly stroked home his spot-kick after Blades substitute Darryl Westlake was harshly adjudged to have fouled Angelo Balanta, ending the Blades' unbeaten start to the League One season.
"I thought we deserved it, I thought we were in control for all the game," said Robinson, whose side extended their winning run to three games. "There were one or two flashpoints obviously, which will be the talking points, but I thought over 90 minutes that our attitude, our endeavour, our football and our defending were brilliant.
"It was almost the complete performance in my view - that's as good as you're going to get.
"I didn't think the penalty in the second half was a penalty that he did give - I find it baffling how he did give it. But the one in the first half when Dean Bowditch was in on goal and he was brought down and he was in control of the ball - it should have been a penalty and sending off after 30 minutes.
"We would have been 1-0 up with an hour left of the game, then maybe it would have been a bit of an easier second half for us to endure. But he got the biggest one wrong."