Two goals apiece from Preston Fearon and Callum Marshall, either side of an own goal, secured the win for the young Hammers, while Aaron Collins won and scored a penalty for the hosts.
Here are our ratings after the Vertu Trophy defeat.
9. Will Collar - 4
A pretty anonymous outing when he should really have controlled the midfield | Jane Russell
10. Jonathan Leko - 4
Ineffective for the most part. Squandered Dons' best first-half chance and did little in the second | Jane Russell
11. Top Don: Aaron Collins - 5
Won and converted the penalty for the only goal of the game. Had a few flashes as he came through important minutes on his return after injury | Jane Russell
12. Chase Medwynter - 4.5
Barely saw the ball in the first-half but looked a real handful in the second | Jane Russell
3 / 4