The Black Cats took a first-half lead when Amad set up Ellis Simms to score in the 25th minute. Birmingham saw more of the ball but fell further behind when Amad scored an excellent second for the Black Cats, converting in front of the travelling fans.
Substitute Lukas Jutkiewicz then pulled a goal back for Birmingham 12 minutes from time but Sunderland were able to hold on. Here, though, we take a look at the best photos of fans throughout the win courtesy of our photographer Frank Reid:
1. Sunderland fans
Sunderland fans in action at St. Andrew's against Birmingham City in the Championship. Tony Mowbray's men won the game 2-1 with goals from Ellis Simms and Amad Diallo. Photo: Frank Reid
2. Sunderland fans
Sunderland fans in action at St. Andrew's against Birmingham City in the Championship. Tony Mowbray's men won the game 2-1 with goals from Ellis Simms and Amad Diallo. Photo: Frank Reid
3. Sunderland fans
Sunderland fans in action at St. Andrew's against Birmingham City in the Championship. Tony Mowbray's men won the game 2-1 with goals from Ellis Simms and Amad Diallo. Photo: Frank Reid
4. Sunderland fans
Sunderland fans in action at St. Andrew's against Birmingham City in the Championship. Tony Mowbray's men won the game 2-1 with goals from Ellis Simms and Amad Diallo. Photo: Frank Reid