The Kansas City Chiefs, the defending Super Bowl champions, suffered their first loss of the NFL season on Sunday, falling 30-21 on the road against the Buffalo Bills after winning their first nine games.

The result ends any talk of the Chiefs matching the 1972 Miami Dolphins with an unbeaten season and was another reminder of the class of the Bills and Buffalo quarterback Josh Allen.

With the Bills leading 23-21, Allen secured the victory in stunning fashion with a 26-yard run on fourth down, demonstrating not only his footwork and speed but also his strength as he broke two tackles to power into the end zone.