Tony Mowbray’s side took an early lead when Ellis Simms headed them ahead in the 19th minute, yet Latics striker Will Keane equalised three minutes before half-time.
Ross Stewart then came off the bench to restore the visitors’ lead, converting a penalty after Patrick Roberts was fouled in the box.
Roberts then scored his third goal of the season to secure the victory, before a stunning strike from Amad made it four.
Here’s how Phil Smith rated each Sunderland player at the DW Stadium:
5. Trai Hume - 7
Has a great leap and a willingness to fly into challenges that the fans absolutely relish. Is turning himself into a genuine contender for a regular full-back role in this team. 7 Photo: Frank Reid
6. Dan Neil - 9
Asked to play the crucially important holding midfield role and was virtually flawless. Normally Evans is a huge miss but Neil played with poise and maturity. Low-key one of his best showings for the club. 9 Photo: Martin Swinney
7. Edouard Michut - 7
Showed he has real talent, particularly early on when he zipped the ball around with precision. A little quieter after half time but an encouraging full debut. 7 Photo: Frank Reid
8. Abdoullah Ba - 8
A wonderful performance and an excellent decision from Mowbray to deploy him in an advanced position. A constant thorn in Wigan’s side and a joy to watch at times. 8 Photo: Frank Reid