Photos: UFC 197: Jon Jones vs. Ovince St. Preux

Ovince St. Preux, left, and Jon Jones trade blows during an interim light-heavyweight championship bout at UFC 197 on April 23.

Jon Jones kicks Ovince Saint Preux during an interim light-heavyweight championship bout at UFC 197 on April 23.

Jon Jones takes down Ovince St. Preux during an interim light-heavyweight championship bout at UFC 197 on April 23.

Jon Jones exchanges blows with Ovince St. Preux during an interim light-heavyweight championship fight at UFC 197 on April 23.

Jon Jones kicks Ovince St. Preux during an interim light-heavyweight championship fight at UFC 197 on April 23.

Demetrious Johnson celebrates after defeating Henry Cejudo in a flyweight championship bout at UFC 197 on April 23.  (John Locher / Associated Press)

Demetrious Johnson moves over Henry Cejudo during a flyweight championship bout at UFC 197 on April 23.

Anthony Pettis and Edson Barboza fight during a lightweight bout at UFC 197 on April 23.

Edson Barboza kicks Anthony Pettis during a lightweight bout at UFC 197 on April 23.

Edson Barboza celebrates after defeating Anthony Pettis during a lightweight fight at UFC 197 on April 23.

Robert Whittaker hits Rafael Natal with a left hand during a middleweight fight at UFC 197 on April 23.

Robert Whittaker kicks Rafael Natal during a middleweight fight at UFC 197 on April 23.

Robert Whittaker and Rafael Natal, right, fight during a middleweight bout at UFC 197 on April 23.

Andre Fili, left, fights Yair Rodriguez during a featherweight bout at UFC 197 on April 23.

Yair Rodriguez kicks Andre Fili during a featherweight bout at UFC 197 on April 23.

Yair Rodriguez celebrates after defeating Andre Fili during a featherweight bout at UFC 197 on April 23.