Song Yadong delivered one of the weekend's biggest upsets, knocking out Umar Nurmagomedov in the bantamweight main event at UFC Fight Night in Shanghai. Nurmagomedov came in as the heavy favorite, but Song caught him and finished the fight decisively with the knockout. The result reshapes the bantamweight picture and proves Song belongs in the conversation at 135 pounds. Nurmagomedov's undefeated record is now in the books, and Song moves into serious contention with one of the most impressive wins of his career.