Rafael Fiziev KOs Rafael Dos Anjos at Fight Night

Rafael Fiziev knocked out Rafael Dos Anjos 18 seconds into the fifth round in their lightweight bout at UFC Fight Night on Saturday in Las Vegas.

Fiziev connected on a left hook in the final round to extend his winning streak to six. Fiziev now has three KOs in his last four UFC bouts.

"Now we know who the best Rafael is in the UFC," Fiziev said afterward. "Now we know, and now I want to make a challenge: Who is the bes