Carl Baker’s second-half strike saw the Dons run out 1-0 winners over Sheffield United and keep up the pace with the top two in League 1.
Karl Robinson was forced into one change with Dean Bowditch coming in for Darren Potter, who was absent due to personal reasons.
After an evenly-contested opening, the first chance of the game fell to Samir Carruthers, who saw his 20-yard shot deflect into the grateful arms of Mark Howard.
In the 15th minute, a fantastic bit of skill and then a clever pass from Carl Baker found Bowditch, who gave the ball back to the winger but, after cleverly getting away from his man, he fired into the side-netting from 15 yards.
A mix-up between Howard and Jay McEveley almost presented Dele Alli with a chance midway through a half the Dons were beginning to control, but the midfielder couldn’t quite get around the defender before the keeper claimed.
Alli was at the heart of a slick move involving three Dons a minute later but the former couldn’t quite find a team-mate when he got to the byline.
Michael Doyle fired a warning shot for the Blades when he sent an effort wide of the target from 25 yards as the clock ticked towards the half-hour mark.
After a perfect cross-field ball from Alli, nice link-up play between Jordan Spence and Ben Reeves won the Dons a corner shortly afterwards, however, nothing came of the resulting set-piece.
Some more intricate build-up created a chance, albeit a very difficult one, for Bowditch, and his flicked header from Reeves’ cross was easily caught by Howard.
Baker flashed a 25-yard effort not too far over the top on 38 minutes while, at the other end, Terry Kennedy couldn’t get enough on Jose Baxter’s dangerous free-kick and David Martin gathered.
The lively Baker forced Howard into a smart save down to his right, again from distance, on 41 minutes, but the best chance in the dying embers of the first period fell to Jamal Campbell-Ryce, who was brilliantly denied by Martin when put through one-on-one.
Spence stung the palms of Howard with a rasping 20-yard effort two minutes into the second half as the Dons looked to turn their pressure into an opener.
At the other end, Blades substitute Louis Reed sent a shot just past the left-hand post on 52 minutes which lifted the visitors.
Robinson tried to bring a fresh spark to his side’s attack by introducing new signing Jonson Clarke-Harris in place of Bowditch with 25 minutes remaining.
However, it was one of the starters who made the breakthrough two minutes later – Baker coolly slotting into the bottom right-hand corner from 20 yards after Will Grigg had made a nuisance of himself.
Looking sharp, Clarke-Harris latched on to Alli’s through-ball and fired into the side-netting on 70 minutes as the men from MK1 chased a quick second.
The Blades were almost level, though, on 75 minutes when Campbell-Ryce’s teasing delivery fizzed all the way across the six-yard box.
Substitute Che Adams shot straight down the throat of Martin from a 20-yard free-kick while, at the other, Antony Kay saw a goal-bound effort blocked with five minutes remaining after the Blades had failed to clear a free-kick.
The two Michaels – Higdon and Doyle – sent efforts wide of the target in the final minutes but, in truth, the Dons saw out the game fairly comfortably.
Starting XI: Martin; Spence, Kay, McFadzean, Lewington; Carruthers (Randall 86), Alli; Reeves (Baldock 90), Bowditch (Clarke-Harris 65), Baker; Grigg.
Unused subs: McLoughlin, Hodson, Green, Hitchcock.
Bookings: McFadzean, Spence, Baker.
Goals: Baker (67).
Attendance: 9,633 (1,451 away)