After a goalless first half, Trai Hume opened the scoring with a header for the Black Cats seven minutes after the interval.
United captain Charlie Mulgrew then scored a spectacular own goal to double Sunderland’s lead ten minutes later.
Neil named a strong starting XI against the SPL side and only made two changes in the second half.
Here’s how each Sunderland player fared at Tannadice Park:
5. Dennis Cirkin - 7
Assisted Hume’s goal with a cross which was punched clear. Was left scrambling a few times defensively but was often on the front foot. 7 Photo: JPI Media
6. Corry Evans - 7
Composed on the ball in midfield, while organising his team-mates preventing danger in front of Sunderland’s back four. 7 Photo: JPI Media
7. Dan Neil - 8
Busy in midfield and tried to play the ball forward when he could. Was allowed to make a couple of threatening runs into the box to pose a goal threat. 8 Photo: JPI Media
8. Patrick Roberts - 7
Looked lively in the first half and played an excellent pass to send Stewart through on goal. Faded a little in the second. 7 Photo: Frank Reid