UFC Fight Night: Saint Preux vs. Okami was a mixed martial arts event produced by the Ultimate Fighting Championship held on September 23, 2017 at Saitama Super Arena in Saitama, Japan.

Ovince Saint Preux is an American professional mixed martial artist who competes in the light heavyweight division of the UFC. A professional competitor since 2008, Saint Preux has also formerly competed for Strikeforce, the XFC, and Shark Fights. He is known for his unorthodox fighting style, and has gained notability and notoriety for having won four fights using the rare Von Flue choke submission, leading to fans renaming it to the "Von Preux choke".