Foxes defender James Juston scored the only goal of the game when he headed home Kienan Dewsbury-Hall’s corner in the 12th minute.
Sunderland then had a strong penalty appeal turned down on the stroke of half-time when Dan Neil was brought down by Wout Faes.
Here, though, we take a look at the best photos of Sunderland fans throughout the day courtesy of Chris Fryatt:
1. Sunderland fans
Sunderland were beaten 1-0 by Championship leaders Leicester at the King Power Stadium – with our cameras in attendance to capture the action. Photos courtesy of Chris Fryatt. Photo: Chris Fryatt
2. Sunderland fans
Sunderland were beaten 1-0 by Championship leaders Leicester at the King Power Stadium – with our cameras in attendance to capture the action. Photos courtesy of Chris Fryatt. Photo: Chris Fryatt
3. Sunderland fans
Sunderland were beaten 1-0 by Championship leaders Leicester at the King Power Stadium – with our cameras in attendance to capture the action. Photos courtesy of Chris Fryatt. Photo: Chris Fryatt
4. Sunderland fans
Sunderland were beaten 1-0 by Championship leaders Leicester at the King Power Stadium – with our cameras in attendance to capture the action. Photos courtesy of Chris Fryatt. Photo: Chris Fryatt