Mo Eisa scored a fine free-kick on 36 minutes for his ninth goal and Dons’ ninth win of the season as they closed the gap to safety to two points, worsening Cambridge’s problems as they fell five points back in 23rd.
Here’s how we rated the players at Stadium MK.
1. Jamie Cumming - 7
A solid display. Not really under much pressure but made saves when it counted Photo: Jane Russell
2. Dean Lewington - 7.5
A brilliant return to the side after nearly four months out. Gave Dons' defence a sense of solidarity and a strong voice on the pitch for 66 minutes Photo: Jane Russell
3. Top Don: Jack Tucker - 8
Didn't let a ball past him all afternoon - except when he was taken out by his own team-mate - in an excellent showing after a tough few weeks for the young defender Photo: Jane Russell
4. Tennai Watson - 7
A good showing out of position for Watson, playing at right centre-back. Photo: Jane Russell