Talking Stick Resort Arena, Phoenix - In a battle of former middleweight world champions, Daniel Jacobs (36-3, 30 KOs) won by TKO after five rounds, after Julio Cesar Chavez Jr. (51-4-1, 33 KOs) refused to continue after the fifth round was over.

“It was a very good fight. I was getting close but got headbutted above the left eye. Then I had problems because of all the blood. I came over to the corner and couldn’t breathe. He elbowed me, and headbutted me. Very tough fight, I felt I couldn’t go cause I couldn’t breathe properly. The ref wasn’t calling anything," Chavez Jr. said.

“I apologize to the fans. I’d love to have a rematch. I got headbutted, he fought a dirty fight, and didn’t even take a point away. He would have been able to continue doing the dirty work.”

Chavez Jr. was moving forward and pressing the action when the first round began. Chavez Jr. was controlling the action early on, but Jacobs began to let his hands go in the closing moments.

Chavez Jr. was chasing in the second. Jacobs was working a solid jab and landing good shots when the openings were there. Jacobs outboxed Chavez Jr. in the third. Jacobs controlled the fourth and was trading shots with Chavez Jr. in the closing moments.

Chavez was doing well in the fifth round. Jacobs was really letting loose at the end of the round. Once the round ended, Chavez Jr. called over  the referee and indicated some sort of injury was preventing him from fighting any further.

The crowd went nuts, pelting all sorts of items into the ring and appearing close to a dangerous situation.