The Black Cats took the lead when Corry Evans opened the scoring with a low shot in the 16th minute, yet U’s defender Elliott Moore headed the hosts level before half-time.
Both sides had chances in the second half before Sunderland substitute Elliot Embleton scored a dramatic winner two minutes from the end.
The result moved Sunderland back into the play-off places as league rivals Wycombe and Sheffield Wednesday and Plymouth all dropped points.
Here, though, we take a look at the best photos of Sunderland fans throughout the day courtesy of our photographer Frank Reid:
The result moved Sunderland back into the play-off places as league rivals Wycombe and Sheffield Wednesday and Plymouth all dropped points.
10. The away end
Can you spot anyone that you know at the Kassam Stadium? Photo: Frank Reid