Goals from Matt Dennis and Darragh Burns ensured Liam Manning’s side are in tonight’s hat for the third round draw.
Here’s how we rated the players at Vicarage Road.
13. Sub: Dan Kemp - 7
Almost made it 3-0 with a cracking effort from inside the box, forcing the keeper into an important save Photo: Jane Russell
14. Sub: Jack Tucker - 7.5
Came on when Watford started to turn the screw and defended excellently with his back to the wall Photo: Jane Russell
15. Sub: Ethan Robson - 6.5
Gave Dons some more discipline and rigidity in the centre when he came on Photo: Jane Russell
16. Sub: Nathan Holland - 6
Got a few touches late on as he returned from his spell on the sidelines Photo: Jane Russell