The Black Cats have won just one of their last seven games, including three successive defeats in League One.
Sunderland have lost to Bolton Wanderers, Doncaster Rovers and now Cheltenham Town.
1,520 travelling fans made the trip to Cheltenham and were badly let down again.
Here, though, we take a look at the best photos of Sunderland fans throughout the day.
Can you spot anybody that you know? Let us know on our social media channels.
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1. Smiles before the game
A Sunderland fan at Cheltenham Town as the Black Cats suffer a 2-1 defeat. Photo: Frank Reid
2. Smiles before the game
The result was Sunderland's third loss in a row in League One. Photo: Frank Reid
3. Not happy
A Sunderland fan at Cheltenham Town as the Black Cats suffer a 2-1 defeat. Photo: Frank Reid
4. Watching on
A Sunderland fan at Cheltenham Town as the Black Cats suffer a 2-1 defeat. Photo: Frank Reid